What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?










66














What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










share|improve this question



















  • 17




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    Nov 14 at 20:26















66














What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










share|improve this question



















  • 17




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    Nov 14 at 20:26













66












66








66


12





What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










share|improve this question















What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here







identification wiring terminology






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 15 at 17:46









chicks

12116




12116










asked Nov 12 at 7:31









Zhro

1,3852315




1,3852315







  • 17




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    Nov 14 at 20:26












  • 17




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    Nov 14 at 20:26







17




17




In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
– Eric Lippert
Nov 12 at 15:43




In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
– Eric Lippert
Nov 12 at 15:43












Any way to put the comprehensive answer into the FAQ listing?
– KalleMP
Nov 14 at 20:26




Any way to put the comprehensive answer into the FAQ listing?
– KalleMP
Nov 14 at 20:26










5 Answers
5






active

oldest

votes


















182














That's a grommet, not to be confused with Gromit.



enter image description here



Gromit, of Wallace and Gromit fame.






share|improve this answer


















  • 10




    made my day :-)
    – Blup1980
    Nov 12 at 8:19






  • 4




    Got our "funny" head on today? plus 1... :)
    – Solar Mike
    Nov 12 at 9:09






  • 32




    Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
    – Wossname
    Nov 12 at 10:18






  • 14




    @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
    – Martin Bonner
    Nov 13 at 9:43






  • 10




    @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
    – John U
    Nov 13 at 12:28


















110














Summary:



I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.




Is it a grommet or a bushing?



The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



enter image description here



What's is the purpose of grommets and bushings?



When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



Examples of common bushings




  • PVC Bushings



    Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1



enter image description here




  • Snap Bushings



    Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



    Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1



enter image description here




  • Snub Bushings



    Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1



enter image description here




  • Open Bushings



    An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1



enter image description here



Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



enter image description here



enter image description here




What is the identity of the part in the question?



The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






share|improve this answer


















  • 4




    Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
    – JPhi1618
    Nov 12 at 17:19










  • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
    – mbrig
    Nov 12 at 22:31






  • 2




    Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
    – rrauenza
    Nov 12 at 23:59






  • 1




    duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
    – YetAnotherRandomUser
    Nov 13 at 2:18






  • 1




    You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
    – chasly from UK
    Nov 16 at 15:21


















26














They are called grommets. You can also get grommet strip.






share|improve this answer




























    24














    Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



    These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



    Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



    enter image description here



    RS-Components Stock No. 136-1750






    share|improve this answer






















    • Can you provide an example image of cable grips?
      – Zhro
      Nov 12 at 11:45











    • Yes - updated my answer.
      – John U
      Nov 12 at 12:31


















    2














    They're called "Strain Relief Bushings"



    Strain Relief Bushing






    share|improve this answer




















    • I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
      – chasly from UK
      Nov 19 at 10:59










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    5 Answers
    5






    active

    oldest

    votes








    5 Answers
    5






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    182














    That's a grommet, not to be confused with Gromit.



    enter image description here



    Gromit, of Wallace and Gromit fame.






    share|improve this answer


















    • 10




      made my day :-)
      – Blup1980
      Nov 12 at 8:19






    • 4




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09






    • 32




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18






    • 14




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43






    • 10




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28















    182














    That's a grommet, not to be confused with Gromit.



    enter image description here



    Gromit, of Wallace and Gromit fame.






    share|improve this answer


















    • 10




      made my day :-)
      – Blup1980
      Nov 12 at 8:19






    • 4




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09






    • 32




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18






    • 14




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43






    • 10




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28













    182












    182








    182






    That's a grommet, not to be confused with Gromit.



    enter image description here



    Gromit, of Wallace and Gromit fame.






    share|improve this answer














    That's a grommet, not to be confused with Gromit.



    enter image description here



    Gromit, of Wallace and Gromit fame.







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Nov 15 at 18:45









    Community

    1




    1










    answered Nov 12 at 8:15









    Transistor

    79.7k777172




    79.7k777172







    • 10




      made my day :-)
      – Blup1980
      Nov 12 at 8:19






    • 4




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09






    • 32




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18






    • 14




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43






    • 10




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28












    • 10




      made my day :-)
      – Blup1980
      Nov 12 at 8:19






    • 4




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09






    • 32




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18






    • 14




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43






    • 10




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28







    10




    10




    made my day :-)
    – Blup1980
    Nov 12 at 8:19




    made my day :-)
    – Blup1980
    Nov 12 at 8:19




    4




    4




    Got our "funny" head on today? plus 1... :)
    – Solar Mike
    Nov 12 at 9:09




    Got our "funny" head on today? plus 1... :)
    – Solar Mike
    Nov 12 at 9:09




    32




    32




    Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
    – Wossname
    Nov 12 at 10:18




    Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
    – Wossname
    Nov 12 at 10:18




    14




    14




    @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
    – Martin Bonner
    Nov 13 at 9:43




    @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
    – Martin Bonner
    Nov 13 at 9:43




    10




    10




    @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
    – John U
    Nov 13 at 12:28




    @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
    – John U
    Nov 13 at 12:28













    110














    Summary:



    I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.




    Is it a grommet or a bushing?



    The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



    A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



    enter image description here



    What's is the purpose of grommets and bushings?



    When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



    A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



    Examples of common bushings




    • PVC Bushings



      Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1



    enter image description here




    • Snap Bushings



      Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



      Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1



    enter image description here




    • Snub Bushings



      Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1



    enter image description here




    • Open Bushings



      An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1



    enter image description here



    Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



    enter image description here



    enter image description here




    What is the identity of the part in the question?



    The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



    Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






    share|improve this answer


















    • 4




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19










    • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31






    • 2




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59






    • 1




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18






    • 1




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      Nov 16 at 15:21















    110














    Summary:



    I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.




    Is it a grommet or a bushing?



    The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



    A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



    enter image description here



    What's is the purpose of grommets and bushings?



    When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



    A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



    Examples of common bushings




    • PVC Bushings



      Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1



    enter image description here




    • Snap Bushings



      Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



      Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1



    enter image description here




    • Snub Bushings



      Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1



    enter image description here




    • Open Bushings



      An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1



    enter image description here



    Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



    enter image description here



    enter image description here




    What is the identity of the part in the question?



    The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



    Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






    share|improve this answer


















    • 4




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19










    • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31






    • 2




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59






    • 1




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18






    • 1




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      Nov 16 at 15:21













    110












    110








    110






    Summary:



    I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.




    Is it a grommet or a bushing?



    The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



    A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



    enter image description here



    What's is the purpose of grommets and bushings?



    When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



    A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



    Examples of common bushings




    • PVC Bushings



      Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1



    enter image description here




    • Snap Bushings



      Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



      Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1



    enter image description here




    • Snub Bushings



      Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1



    enter image description here




    • Open Bushings



      An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1



    enter image description here



    Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



    enter image description here



    enter image description here




    What is the identity of the part in the question?



    The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



    Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






    share|improve this answer














    Summary:



    I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.




    Is it a grommet or a bushing?



    The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



    A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



    enter image description here



    What's is the purpose of grommets and bushings?



    When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



    A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



    Examples of common bushings




    • PVC Bushings



      Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1



    enter image description here




    • Snap Bushings



      Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



      Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1



    enter image description here




    • Snub Bushings



      Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1



    enter image description here




    • Open Bushings



      An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1



    enter image description here



    Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



    enter image description here



    enter image description here




    What is the identity of the part in the question?



    The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



    Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Nov 12 at 11:26

























    answered Nov 12 at 11:06









    Zhro

    1,3852315




    1,3852315







    • 4




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19










    • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31






    • 2




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59






    • 1




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18






    • 1




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      Nov 16 at 15:21












    • 4




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19










    • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31






    • 2




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59






    • 1




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18






    • 1




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      Nov 16 at 15:21







    4




    4




    Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
    – JPhi1618
    Nov 12 at 17:19




    Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
    – JPhi1618
    Nov 12 at 17:19












    I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
    – mbrig
    Nov 12 at 22:31




    I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
    – mbrig
    Nov 12 at 22:31




    2




    2




    Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
    – rrauenza
    Nov 12 at 23:59




    Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
    – rrauenza
    Nov 12 at 23:59




    1




    1




    duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
    – YetAnotherRandomUser
    Nov 13 at 2:18




    duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
    – YetAnotherRandomUser
    Nov 13 at 2:18




    1




    1




    You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
    – chasly from UK
    Nov 16 at 15:21




    You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
    – chasly from UK
    Nov 16 at 15:21











    26














    They are called grommets. You can also get grommet strip.






    share|improve this answer

























      26














      They are called grommets. You can also get grommet strip.






      share|improve this answer























        26












        26








        26






        They are called grommets. You can also get grommet strip.






        share|improve this answer












        They are called grommets. You can also get grommet strip.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 12 at 7:42









        Steve Hubbard

        1,02217




        1,02217





















            24














            Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



            These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



            Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



            enter image description here



            RS-Components Stock No. 136-1750






            share|improve this answer






















            • Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45











            • Yes - updated my answer.
              – John U
              Nov 12 at 12:31















            24














            Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



            These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



            Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



            enter image description here



            RS-Components Stock No. 136-1750






            share|improve this answer






















            • Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45











            • Yes - updated my answer.
              – John U
              Nov 12 at 12:31













            24












            24








            24






            Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



            These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



            Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



            enter image description here



            RS-Components Stock No. 136-1750






            share|improve this answer














            Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



            These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



            Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



            enter image description here



            RS-Components Stock No. 136-1750







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Nov 12 at 12:31

























            answered Nov 12 at 11:40









            John U

            5,80811330




            5,80811330











            • Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45











            • Yes - updated my answer.
              – John U
              Nov 12 at 12:31
















            • Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45











            • Yes - updated my answer.
              – John U
              Nov 12 at 12:31















            Can you provide an example image of cable grips?
            – Zhro
            Nov 12 at 11:45





            Can you provide an example image of cable grips?
            – Zhro
            Nov 12 at 11:45













            Yes - updated my answer.
            – John U
            Nov 12 at 12:31




            Yes - updated my answer.
            – John U
            Nov 12 at 12:31











            2














            They're called "Strain Relief Bushings"



            Strain Relief Bushing






            share|improve this answer




















            • I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
              – chasly from UK
              Nov 19 at 10:59















            2














            They're called "Strain Relief Bushings"



            Strain Relief Bushing






            share|improve this answer




















            • I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
              – chasly from UK
              Nov 19 at 10:59













            2












            2








            2






            They're called "Strain Relief Bushings"



            Strain Relief Bushing






            share|improve this answer












            They're called "Strain Relief Bushings"



            Strain Relief Bushing







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 16 at 2:58









            Bill Simpson

            312




            312











            • I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
              – chasly from UK
              Nov 19 at 10:59
















            • I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
              – chasly from UK
              Nov 19 at 10:59















            I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
            – chasly from UK
            Nov 19 at 10:59




            I don't think they are because Strain Relief Bushings grip the cord to prevent strain on the connections. The OP refers to a device to prevent chafing. The original photo shows a device that clearly does not grip the cord.
            – chasly from UK
            Nov 19 at 10:59

















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