This Yankee Hill Machine thread protector caps the muzzle threads on .22 LR and .223/5.56 barrels when no muzzle device is installed. It prevents thread damage from impacts, cleaning rods, and debris while maintaining a clean barrel profile. Essential for preserving threads between device swaps or during storage and transport.
Constructed from steel with a black finish and knurled exterior for hand-tight installation and removal. The .920-inch outer diameter matches common bull and heavy barrel contours on precision rimfire and AR-15 platform rifles. Install finger-tight or snug with a strap wrench—avoid over-torquing.
Type: Thread Protector
Thread Pitch: 1/2x28
Outer Diameter: .920 inch
Material: Steel
Finish: Black
Compatible Calibers: .22 LR, .223 Remington, 5.56 NATO
