Lock Washer, Wedge, Stainless Steel, Finish Plain, Fits Bolt Sizes 1/2 In., 1/2 In., Inside Dia. 0.510 In., Outside Dia. 0.937 In., Thickness 0.136 In., Color Silver, Rockwell Hardness HRC 25, General Purpose, For Use With Bolts, Package Quantity 100. This item has been restricted from sale in the following state (s): []