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Part# AN931-12-20
MFR Model# MR-200-8848
DescriptionPart Number
ELASTIC GROMMET AN931-12-20AN931-12-20


**Note: All sizes in chart are in inches**

Flexible grommets, made of black synthetic rubber to specification MIL-G-3036. Resistant to hot oil & coolant. Used to protect tubing, wiring and control cables where they pass through bulkheads & firewalls.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -

Reference Chart


These grommets were absolutely a perfect fit. It was really helpful to have the table of dimensions to get just the right size! Great to know about this feature for future use.

Eileen B
October 26, 2020

This was actually the 2nd order I had shipped. The first order was not received. It was lost during shipping. Please call 305-780-3902 so we can get the 1st order delivered or refunded. Thanks

Dale H
August 22, 2020

Correct part and cure date for my purpose. Bonanza Brake Piston O Rings.

Edward H
April 23, 2020


William L
April 19, 2020

High quality rubber grommets

Al A
March 23, 2020

Good quality grommets.

Lewis M
October 24, 2019

I was very pleasantly surprised, not just with the order, but Connie at the order desk contacted me to advise that shipping by courier would have been 3 times the price of my small order. She agreed to ship it by Canada Post and it arrived two days later! Very impressed!

Michael A
May 14, 2019

Grommets exactly what I ordered.

Robert M
May 3, 2019

This is exactly what was needed to replace worn grommet in my carburetor heat butterfly valve.

March 14, 2019

better than I expected. Works great

March 15, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: It would be really helpful if you could list the groove width (panel thickness) of these grommets.

Thank you for bringing this to our attention. We have since added it to our chart.

Q: Is there a drawing that available for the dimensions of the AN931 elastic grommets? For example, what does hole size mean?

We have added the drawing as a reference above the chart. It shows the letters that correspond to the different dimensions in the chart. Please review the updated web page for clarification.

Q: Are these AN931 grommets made of Silicone Rubber?

Yes, they are made of synthetic and silicone rubber.

Q: Is the price per piece indicated? How many pieces are in the package?

These are sold individually.

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