Split Lock Washer, Extra Duty, Steel, Finish Plain, Fits Bolt Sizes 1 In, Inside Dia. 1.003 In, Outside Dia. 1.794 In, Thickness 0.330 In, Thickness Tolerance + 0.020 In, Color Black, Rockwell Hardness C38-46, N/A, Meets/Exceeds ASME B 18.21. 1, Package Quantity 10. This item has been restricted from sale in the following state (s): []