Split Lock Washer, Standard, 316 Stainless Steel, Finish NL-19(r), Fits Bolt Sizes M5, M5, Inside Dia. 5.1mm, Outside Dia. 9.2mm, Thickness 1.20mm, Thickness Tolerance +/-0.2mm, Color Silver, Rockwell Hardness C35, Metalworking, Fastening, For Use With Machine Screws and Nuts, Meets/Exceeds ANSI B18.21.1, Package Quantity 100