Manufacturer Part Number: 500012|Washer Type|USSMaterial|Carbon SteelMaterial Grade|8Screw Size|1-1/2 inThread Size|Inside Diameter (Inch)|1-5/8Inside Diameter (Decimal Inch)|1.6250Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|Outside Diameter (Decimal Inch - 4 Decimals)|3.5000Thickness (mm)|Thickness (Inch)|3/16Thickness (Decimal Inch - 4 Decimals)|0.1870Standards|Finish Coating|Yellow Zinc ChromateFastener Standard|ASTM F436Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|31161807