Manufacturer Part Number: FW00004|Washer Type|USS; SAEMaterial|Case Hardened SteelMaterial Grade|Screw Size|1/2Thread Size|Inside Diameter (Inch)|17/32Inside Diameter (Decimal Inch)|Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|1-3/8Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|Thickness (Inch)|5/32Thickness (Decimal Inch - 4 Decimals)|Standards|Finish Coating|Black OxideFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|