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 troubleshooting 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.

Weight 0.25 lbs
Dimensions 4 × 5 × 1 in

SPT Firewall Cable Grommett Mount, SPT Grommet Id Size 3/16”, SPT Grommet Id Size 5/16", SPT Grommet Id Size 3/8"


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.

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.


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