Split Lock Washer, Standard, 316 Stainless Steel, Finish NL-19 (r), Fits Bolt Sizes M20, M20, Inside Dia. 20.2 mm, Outside Dia. 33.6 mm, Thickness 4.00 mm, Thickness Tolerance +/- 0.2 mm, Color Silver, Rockwell Hardness C35, Metalworking, Fastening, For Use With Machine Screws and Nuts, Meets/Exceeds ANSI B 18.21. 1, Package Quantity 10. This item has been restricted from sale in the following state (s): []