Lock Washer, External Tooth, Countersunk, 410 Stainless Steel, Finish Plain, Fits Bolt Sizes #4, Inside Dia. 0.116 In, Outside Dia. 0.238 In, Thickness 0.015 In, Thickness Tolerance 0.019 to 0.015 In, Color Silver, Rockwell Hardness C40-50, N/A, Meets/Exceeds ASME B 18.21. 1, Package Quantity 100. This item has been restricted from sale in the following state (s): []