Mil Spec Washer Military Specification 18-8 Stainless Steel Finish Plain Fits Bolt Sizes 1/2 In. Inside Dia 0.531 In. Outside Dia 1.062 In. Thickness 0.074 to 0.121 In. Thickness Tolerance - Slot Width - Radius - Temp (F) - Color - Rockwell Hardness B70 Brinell Hardness - Vickers Hardness - - For Use With Screws and Studs Meets/Exceeds MS15795 Includes - Package Weight 0.1 Approx Pkg Qty - Package Quantity 5