Mil Spec Washer, Flat Washer Type Mil-Spec, Dimensional Standards AN960, QQ-P-35, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 3/8 in, Inside Diameter 0.39 in, Outside Diameter 5/8 in, Maximum Thickness 0.042 in, System of Measurement Inch, Minimum Thickness 0.022 in, Inside Diameter Tolerance +/-0.010 in, Material Quality Standards ASTM A582, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack