Manufacturer Part Number: KP80413|Washer Type|SAE; USSMaterial|Carbon SteelMaterial Grade|9Screw Size|5/16 inThread Size|Inside Diameter (Inch)|11/32Inside Diameter (Decimal Inch)|0.3340Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|Outside Diameter (Decimal Inch - 4 Decimals)|0.6870Thickness (mm)|Thickness (Inch)|5/64Thickness (Decimal Inch - 4 Decimals)|0.0780Standards|Finish Coating|Clear Zinc ChromateFastener Standard|ASTM F436Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|31161807