Manufacturer Part Number: Z9160|Washer Type|Extra ThickMaterial|Stainless SteelMaterial Grade|18-8Screw Size|8Thread Size|Inside Diameter (Inch)|3/16Inside Diameter (Decimal Inch)|0.1875Inside Diameter (mm)|Outside Diameter (mm)|Outside Diameter (Inch)|7/16Outside Diameter (Decimal Inch - 4 Decimals)|0.4375Thickness (mm)|Thickness (Inch)|5/64Thickness (Decimal Inch - 4 Decimals)|0.0781Standards|Finish Coating|PlainFastener Standard|Military Specification|System Of Measurement|InchAdditional Information|Product Service Code|UNSPSC Code|31161807