Thumbs 1
Thumbs 1
Thumbs 1
Thumbs 1

Spt Firewall Cable Grommet Mount

From $2.95 to $72.90
Description ID OD Panel Hole Part Number Price Buy
SPT Firewall Cable Grommett Mount------
SPT Grommet Id Size 3/16”3/16”7/16”5/16"
SPT Grommet Id Size 5/16"5/16"13/16"9/16"
SPT Grommet Id Size 3/8"3/8"7/8"5/8"
Subtotal $0.00
Add to Wishlist


Superior Panel Technology’s Firewall Penetration Kit (Cable Grommet Mount) allows you to make a rectangular opening large enough to pass a plug measuring 1.25” x 2.9” (which will accept the largest sized plug used for installing the Garmin G3X - GEA24 engine sensors LRU plugs). The opening is then sealed with the 1/8” thick, center-stepped, stainless-steel cover plates. You can make up to three custom-sized holes in the shield to match the size of your wire bundles. Three high-temp, flame retardant, silicone grommets are included (ID sizes 3/16”, 5/16” and 3/8”) with the shield. Additional grommets are available. The final result is that of a very clean, neat and safe installation that allows for much easier future servicing and trouble shooting of wiring problems. You no longer need to hang upside down under your panel trying to crimp pins and sockets. Now you can wire the plugs outside of the plane where it is much easier to accurately crimp and insert the pins and sockets into the plugs.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


  • -60 to +500F (This is twice what a standard grommet can handle).
  • Frequently Purchased With
  • Customers Also Viewed


This is a nice solution for passing large connectors through a firewall. Pretty pricey for what it is but it works.

Specialty A Verified Purchase


January 11, 2023

Works good, lasts a long time, wont rot your teeth.

November 3, 2018

This is a good answer to making firewall penetrations and the grommets are impossible to find anywhere else.

November 6, 2017

Exactly as expected. Good to have many different sizes to get perfect fit. Worked well with FIREWALL SHIELDS 61-275, Part #: 61-275. Would be 5 star if easier to understand selection of grommet sizes

Steve J
April 20, 2019


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: What are the dimensions of the SPT Firewall Cable Grommet Mount? And what is the weight?

The Cable Grommet Mount is 3-7/8" length and 1-3/4" width. It weighs 3.9 ounces. This will include the installation manual as well.

Q: Is this SPT firewall cable grommet suitable for use in a certified aircraft?

This is not FAA/PMA approved. We recommend to get with your A&P mechanic to see what their recommendation is.

View in Catalog

View Image View in Catalog