This new old stock 20mm M3 Thread Protector Sleeve is a genuine U.S. military surplus part designed for the 20mm M3 aircraft automatic cannon—a widely used armament on Cold War-era jet aircraft. Part Number B7226819 and cataloged under NSN 1005-00-722-6819, this threaded sleeve served a vital role in protecting the precision barrel threads of the M3 cannon during storage, transport, or maintenance.

Constructed from durable metal and precision-machined to exact military specifications, the M3 thread protector sleeve is essential for maintaining alignment and safeguarding high-stress thread interfaces. These components were frequently paired with AN/M3 cannons mounted on U.S. Air Force and Navy aircraft, including variants of the F-86 Sabre and early jet fighters and trainers throughout the 1950s and 1960s.

Product Features:

Condition: New Old Stock (NOS)
Part Number: B7226819
NSN: 1005-00-722-6819
Weapon System: 20mm M3 Automatic Aircraft Cannon
Function: Thread protector for barrel muzzle threads
Material: Aerospace-grade machined steel or alloy
Origin: U.S. military contract production

Historical Relevance:

The 20mm M3 cannon was a U.S. adaptation of the Hispano-Suiza HS.404 series, refined for higher rates of fire and integration into American aircraft. Thread protector sleeves like this one were necessary to maintain the serviceability of critical weapon systems in demanding combat environments. By ensuring secure storage and minimizing wear or damage to barrel threads, these sleeves played a small but crucial role in keeping U.S. fighter armament combat-ready during the early jet age.

Ideal For:

Military firearm collectors
Jet aircraft restorers
Aviation ordnance curators
M3 cannon part completions
Museums and static display teams
Surplus military hardware dealers

This 20mm M3 Thread Protector Sleeve is an increasingly hard-to-find component from a foundational era of U.S. aerial firepower. Whether completing a historic aircraft armament restoration or building a parts archive, this new old stock protector adds authenticity and value to your collection.

Approx length 8.5", Approx width 1.5", Approx height 1.5", Approx weight .8lbs.

Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.

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