The GrovTec US Inc GTHM319 Crush Washer for 223 Cal is a precision-made, black nitride finished steel accessory designed to securely install muzzle devices on firearms with a 1/2"-28 thread pitch. Crafted to fit .223 caliber rifles, this 5-pack delivers consistent performance and dependable service with its high-quality steel construction and durable finish that resists wear and corrosion under field use. The crush washer design provides reliable timing and alignment for muzzle devices, helping to achieve optimal accuracy and function while simplifying maintenance and setup. With its robust construction and exacting tolerances, the GTHM319 satisfies demanding handgun and rifle enthusiasts who expect repeatable, clean installation each time, whether upgrading a rifles muzzle setup or performing routine maintenance. This product integrates seamlessly into a range of rifle configurations, offering a practical balance of strength, finish quality, and ease of use for shooters who value reliability in the field, on the range, or during routine rifle maintenance. Ideal for builders and seasonal shooters alike, the GrovTec crush washer combines proven performance with a clean, professional appearance.