Manufacturer Part Number: Z9090|Washer Type|Extra ThickMaterial|Case-Hardened SteelMaterial Grade|1005Screw Size|3/8 inThread Size|Inside Diameter (Inch)|7/16Inside Diameter (Decimal Inch)|0.4375Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|7/8Outside Diameter (Decimal Inch - 4 Decimals)|0.8750Thickness (mm)|Thickness (Inch)|3/16Thickness (Decimal Inch - 4 Decimals)|0.1875Standards|Finish Coating|PlainFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|31161807