Lock Washer, Steel, Delta Protect Finish, Fits Bolt Sizes M10, Inside Dia. 10.7 mm, Outside Dia. 21mm, Thickness 2.5 mm, Thickness Tolerance +/- 0.25 mm, Rockwell Hardness Min. 46 HRC, Meets/Exceeds DIN 25201, Package Quantity 200. This item has been restricted from sale in the following state (s): []