Manufacturer Part Number: 31313|Washer Type|USSMaterial|SteelMaterial Grade|Screw Size|1-3/8 inThread Size|Inside Diameter (Inch)|1-1/2Inside Diameter (Decimal Inch)|Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|3-1/4Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|Thickness (Inch)|Thickness (Decimal Inch - 4 Decimals)|0.1530Standards|Finish Coating|ZincFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|31161807