Enhance the performance and appearance of your firearm with GrovTec's .223 Crush Washers. Crafted from high-quality steel these washers are designed to secure muzzle devices with precision. The premium black nitride finish not only provides a sleek look but also offers enhanced durability and corrosion resistance. Compatible with 1/2"-28 tpi threads this 5-pack ensures reliable installation and long-lasting performance for your firearm needs.