Lock Washer, 254 SMO Stainless Steel, Finish Plain, Fits Bolt Sizes 3/4 In., Inside Dia. 0.79 In., Outside Dia. 1.21 In., Thickness 0.13 In., Thickness Tolerance +/-. 01, Color Silver, Rockwell Hardness Min. 52 HRC, High Vibration, Dynamic Loads, Critical Bolted Joints, Extreme Conditions, For Use With Bolts, Nuts, Hex Head Cap Screws, Socket Head Cap Screws, Adhesives, Washers, Package Quantity 3. This item has been restricted from sale in the following state (s): []