Mil. Spec. Flat Washer, Flat Washer Type Mil-Spec, Dimensional Standards NAS1149, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 1 in, Inside Diameter 1.015 in, Outside Diameter 1 3/4 in, Maximum Thickness 3/32 in, System of Measurement Inch, Minimum Thickness 5/64 in, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards AMS 2700, ASTM A582, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack