Manufacturer Part Number: Z9256|Washer Type|JumboMaterial|Alloy SteelMaterial Grade|Screw Size|2Thread Size|Inside Diameter (Inch)|2-1/8Inside Diameter (Decimal Inch)|2.1250Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|3-3/4Outside Diameter (Decimal Inch - 4 Decimals)|3.7500Thickness (mm)|Thickness (Inch)|1/4Thickness (Decimal Inch - 4 Decimals)|0.2500Standards|Finish Coating|Black OxideFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|