Crafted from premium-grade steel, this mil-spec crush washer is engineered to deliver a reliable and airtight seal for muzzle device installations. Its design facilitates precise alignment of muzzle brakes, compensators and flash hiders, eliminating the need for shims or further adjustments. This crush washer is intended for straightforward, one-time installation, offering the ideal resistance to achieve the correct torque and secure attachment. Compatible with 1/2 inches threaded barrels, it serves as a versatile solution for AR-15s and other rifles with standard threading, ensuring optimal performance and ease of use. Crush washer designed for compatibility with standard muzzle devices (excluding suppressor mounts) 8620 steel with phosphate coating Manufactured in the USA