Yankee Hill Machine sRx Thread Protector | YHM-4450

The Yankee Hill Machine sRx Thread Protector (YHM-4450) covers the threads on sRx mounts to help prevent damage and contamination when a suppressor is not in use. It is intended for owners of the YHM sRx mounting system and compatible suppressors. The protector is compact and intended for storage and transportation to preserve the mating surfaces of the mount.

Product Specifications

• Manufacturer: Yankee Hill Machine.
• Model: sRx Thread Protector.
• Manufacturer part number: YHM-4450.
• Finish reported as black Melonite in one source and black oxide in another; see notes.
• Material reported as Melonite-treated steel in one source and 4140 chrome moly steel in another; see notes.
• Designed to fit YHM sRx muzzle devices and suppressors with 1 3/8" threads.
• Overall length reported as 0.5625 inches in one product description; separate packaging dimensions list 5.5000 inches; see notes.
• Diameter reported as 1 inch.
• Weight reported as 0.448 ounces in one source; another source lists 0.053 (unit unspecified); see notes.
• Product type: Thread Protector.
• Color: Black.
• Fit / compatibility: sRx Muzzle Device.
• UPC: 841812101987.

Compact and purpose-built for the YHM sRx mounting platform, this thread protector helps maintain the condition of threaded interfaces during storage and transport. Its small footprint and straightforward compatibility with 1 3/8" threaded suppressors make it a practical accessory for owners of the sRx system who prioritize preserving their mounting surfaces.