These ½" crush washers are designed to work with the Ruger Hybrid Muzzle Brake in .35 caliber (#90698). Two crush washers should be used to time the muzzle brake during installation. Washers should be installed with the cupped side towards the muzzle. Made from steel with black oxide finish. Sold as a 3-pack only. Made in the USA by Galion LLC.
Installation Instructions: Place the crush washer on the end of the barrel with the cupped face pointing towards the muzzle. Thread the muzzle brake on until hand tight. Align the closed off portion to face the ground. Use a barrel wrench to tighten the muzzle brake down at least 90° and no more than 360° to crush the washer and lock the brake to the muzzle. There is no minimum torque setting for the crush washer.