Wedge Lock Washer, 254 SMO Stainless Steel, Finish Plain, Fits Bolt Sizes 5/16 In., M8, Inside Dia. 0.340 In., Outside Dia. 0.650 In., Thickness 0.080 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, Meets/Exceeds DIN 25201, Package Quantity 10. This item has been restricted from sale in the following state (s): []