Manufacturer Part Number: Z9201U|Washer Type|StandardMaterial|SteelMaterial Grade|Screw Size|5/16 inThread Size|Inside Diameter (Inch)|11/32Inside Diameter (Decimal Inch)|0.3438Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|53/64Outside Diameter (Decimal Inch - 4 Decimals)|0.8281Thickness (mm)|Thickness (Inch)|3/16Thickness (Decimal Inch - 4 Decimals)|0.1875Standards|Finish Coating|Black OxideFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|