Lock Washer, Steel, Delta Protect Finish, Fits Bolt Sizes 1", Inside Dia. 1.100", Outside Dia. 1.910", Thickness 0.180", Thickness Tolerance +/- 0.01", Rockwell Hardness Min. 46 HRC, Meets/Exceeds DIN 25201, Package Quantity 50. This item has been restricted from sale in the following state (s): []