INSTR MNTG NUT A8940-632-493

Packaged Items
SinglePack of 5
Obsolete Part No.Our Part No.NAS Parts No.Instrument Thickness


Cage type. Permit mounting of aircraft instruments from the front of the panel. No charge in panel or instrument design required. Non-magnetic (speed nut is brass; cage is phosphor bronze). Conform to MIL-N-3336. Cage is easily compressed with finger-pressure to allow insertion of legs into clearance holes. When fully inserted and pressure is released, legs spring apart; retain SPEED NUT in screw-receiving position. Turned down corners hold firm against force of in sert ing screw and screw-tightening torque. All instrument mounting nuts listed below take a 6-32 machine screw.

Additional Info: the thread size is the same on each nut, but the instrument bezel thickness can be different per gauge. They are ordered by the back bezel thickness. They are inserted from the back, and they have ears pointing out that slide into a groove between the front and back bezel to stay in place.
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This p/n was supposed to be the correct fastener for a Mid Continent turn coordinator per the notes on the web site for the turn coordinator. Its not. Its too short.

Terrence C Verified Purchase

INSTR MNTG NUT A8940-632-493

April 17, 2024

No screws included?? Had to get screws, and run a tap on them all to get them to work. Would have been really helpfull if the screws were included!

Andrew N Verified Purchase

INSTR MNTG NUT A8940-632-493

September 15, 2023

A bit pricey but they worked great, thank you

Toney U Verified Purchase

INSTR MNTG NUT A8940-632-493 (PACK OF 5)

February 10, 2023

Alex A Verified Purchase

INSTR MNTG NUT A8940-632-493

July 8, 2021

they work.

April 15, 2021

Pefect for those mounting nuts that fall off in the back of the instrument panel when replacing/removing instruments. Excellent directions and sizing instructions given by AS&S.

Stephen M
August 5, 2020


June 23, 2020

I knew what I wanted and that’s what I got.

Phil K
May 3, 2020

Great item that can save many hours of frustration compared to trying to thread a traditional nut. Well worth the money.

July 19, 2018

This type of hardware design is under appreciated. always provides good instrument mounting.

Chris G
May 12, 2017


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.

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