Measuring Guide Open Grommets (Rubber)

A hand holds a digital calliper displaying a measurement of 16.27 mm, with a background of numerous black rubber washers.

Please use the diagram to help you measure the a, b, c, d, e dimensions of the Open/Cable Type Rubber Grommets you require.

Using these measurements as a guide you can then select a product code from our standard stock list that may be suitable for your requirements.

All of our part numbers are made up of the three a, b, c dimensions of the part itself.

Video Guide Watch our measuring guide

Step by Step Instructions Follow along measuring guide

Close up of hands demonstrating how to measure the panel hole size of an Open Grommet.

Step 1. Dimension A

First measure your panel hole, this is dimension A.

Close up of hands demonstrating how to measure the panel thickness of an Open Grommet.

Step 2. Dimension B

Next measure your panel thickness, this is dimension B.

Close up of hands demonstrating how to measure the cable hole size of an Open Grommet.

Step 3. Dimension C

Now measure your cable hole, this is dimension C.

You now have the 3 critical dimensions for an open grommet.

Close up of hands demonstrating how to measure the overall thickness of an Open Grommet.

Step 4. Dimension D

Additionally, you can measure the overall thickness, this is dimension D.

Close up of hands demonstrating how to measure the overall diameter of an Open Grommet.

Step 5. Dimension E

Finally, the overall diameter, this is dimension E.

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