Wedge Lock Washer, Steel, Finish Delta Protect, Fits Bolt Sizes 3/4 in, 3/4 in, Inside Dia. 0.79 in, Outside Dia. 1.21 in, Thickness 0.13 in, Thickness Tolerance +/- 0.01 in, Rockwell Hardness M in 46 HRC, Meets/Exceeds DIN 25201, PK 100. This item has been restricted from sale in the following state (s): []