The Yankee Hill Machine Q.D. Thread Protector YHM-3114 is a protective cap that keeps the ACME threads on your Q.D. flash hiders and mounts from becoming dirty or damaged when your suppressor is not in use. This thread protector fits all YHM Q.D. flash hiders with the exception of .338 Q.D. mounts.
Designed for seamless compatibility with all YHM quick detach flash suppressors and muzzle brakes, this protective cap ensures your muzzle threads remain in pristine condition during storage and between suppressor attachments. The YHM-3114 delivers simple, reliable protection for your firearm’s investment—just install it when your suppressor is removed and forget about it.
Quality engineering is built into every Yankee Hill Machine product, and the Q.D. Thread Protector is no exception. It’s an essential accessory for any shooter running YHM quick detach systems who wants to maintain thread integrity and keep debris out of critical muzzle device components.






