Thick Washer, Flat Washer Type Oversized, Material Steel, Material Grade/Class Through Hardened, Finish Zinc Yellow, For Screw Size 5/16 in, Inside Diameter 0.344 in, Outside Diameter 11/16 in, Maximum Thickness 3/32 in, System of Measurement Inch, Minimum Thickness 3/32 in, Color Yellow, Pack Size Bulk Pack, Rockwell Hardness C43, Thickness Tolerance +0.015/-0.004 in, Package Quantity 7000