Split Lock Washer, Standard, 18-8 Stainless Steel, Finish NL-19 (r), Fits Bolt Sizes 5/8 In., 5/8 In., Inside Dia. 0.628 In., Outside Dia. 1.072 In., Thickness 0.156 In., Thickness Tolerance +/- 0.005 In., Color Silver, Rockwell Hardness C35, Metalworking, Fastening, For Use With Machine Screws and Nuts, Meets/Exceeds ANSI B 18.21. 1, Package Quantity 25. This item has been restricted from sale in the following state (s): []