Split Lock Washer, Hi-Collar, Steel, Plain Finish, Fits Bolt Sizes 5/8 In, Inside Dia 0.641 In, Outside Dia 0.917 In, Thickness 0.203 In, Rockwell Hardness C46, Application For Confined Areas, For Use With Socket Head Cap Screws, Meets/Exceeds ASME B 18.21. 1, Package 100. This item has been restricted from sale in the following state (s): []