Thick Washer, Flat Washer Type Oversized, Material Steel, Material Grade/Class Through Hardened, Finish Zinc Yellow, For Screw Size 3/8 in, Inside Diameter 0.406 in, Outside Diameter 13/16 in, Maximum Thickness 1/8 in, System of Measurement Inch, Minimum Thickness 1/8 in, Color Yellow, Pack Size Bulk Pack, Rockwell Hardness C43, Thickness Tolerance +0.001/-0.015 in, Package Quantity 4000