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Two Piece Firewall Shield - 3/8-Inch Hole

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1-Inch1-1/4 Inch3/4-Inch
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Two piece firewall shield, 3/8-Inch hole and various dimple sizes for grommets.

Two piece shields for use over cables or wires with large end-fittings or existing installations. Single piece for use where the cable or wire may pass through the hole. Flat shields designed for use on wooden or composite firewalls using a fire resistant sealant to prevent leaks. Both types of shield available in flat or with dimple to accommodate rubber grommets up to outside diameter. Actual hole size in 2 piece shields is slightly larger than indicated to prevent chafing cable. Ream pilot hole in single piece shields oversize for the size grommet used. Use grommets that fit tightly around the cable or wire to insure a good seal. Shields may be installed with screws, bolts and plate nuts or rivet nuts. Install cable and grommet in firewall. Locate the shield to insure that it is centered on the cable - then drill attach holes in firewall. Shields predrilled with 5/32 mounting holes. If more than one cable passes through grommet fire resistant sealant must be applied to grommet.

**Caution: Any holes drilled in the firewall are potential source of carbon monoxide in the cockpit. Extreme caution must be exercised when installing firewall shields in your aircraft. They do not provide the nec essary seal around cables or wires to prevent carbon monoxide, smoke or fire from entering the cockpit. The shields are designed only to protect the sealing material (grommets/gaskets) from excessive heat.
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Randal S Verified Purchase


March 29, 2024

Easy to use and the produce a nice finished job.

Chris P Verified Purchase


May 9, 2023

Product works fine but it woujld be incredibly helpful if this were sold as a set with matching grommets for the various size like 1/4, 3/8, etc. and other common sizes.

Steven L Verified Purchase


February 23, 2023

Perfect fit. Exactly what I needed. Matched FIREWALL SHIELDS 61-275, Part #: 61-275 with SPT GROMMET ID SIZE 5/16, Part #: 11-13460

Steve J
April 20, 2019

Works great

Dan M
August 23, 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: What are the dimensions of your #61-475, specifically between mtg holes?

The mounting hole distance is 2.40 inches.

Q: How big are the mounting holes and whats their spacing for your #61-275, 2-piece firewall shield?

They are 2-1/4" from hole center to hole center.

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