YHM Qd Mount Thread Protector

The Yankee Hill Machine Co YHM Quick-Detach Mount Thread Protector (YHM-3114) is a protective cap designed to preserve the ACME threads on quick-detach flash hiders and suppressors mounting systems when a suppressor is removed. This simple but essential accessory prevents thread damage, contamination, and corrosion that can compromise the integrity of your QD mount and affect suppressor reattachment reliability.

ACME-threaded quick-detach mounts are precision components, and exposed threads accumulate dust, debris, and moisture during storage and transport. The YHM protector caps the mounting surface, keeping the threads clean and protected from environmental exposure. Weighing just 0.06 pounds and measuring 3 × 0.5 × 4.5 inches, the cap is compact and portable—ideal for range bags, duty gear, or long-term storage. Its lightweight design adds nothing to your kit while providing genuine protection that extends the service life of your suppressor and host weapon's barrel threads.

This protector is compatible with most YHM quick-detach mounting systems but does not fit .338 QD mounts. Operators who rotate suppressors between rifles, conduct regular field maintenance, or store weapons for extended periods will find this protective cap an inexpensive insurance policy. Serious shooters and law enforcement users who depend on fast, reliable suppressor attachment understand that thread protection is foundational to consistent performance and minimal maintenance downtime.

Thread protectors are often overlooked but represent a best practice in suppressor ownership and storage protocol. The YHM QD Mount Thread Protector complements your investment in quality suppression and ensures your mounting system stays mission-ready.