Manufacturer Part Number: 30773|Washer Type|Duty Type|Screw Size|1/2 inMaterial|Silicon BronzeThread Size|Inside Diameter (mm)|Inside Diameter (Decimal Inch)|0.5020Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|0.8690Thickness (mm)|Thickness (Decimal Inch - 4 Decimals)|0.1250Hardness|Material Grade|Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|0.5060Minimum Inside Diameter (mm)|0.50Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|0.8730Minimum Outside Diameter (mm)|0.87Maximum Outside Diameter (mm)|0.88Maximum Outside Diameter (Decimal Inch)|0.8830Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|ASME B18.21.1Maximum Inside Diameter (Inch)|0.5180System Of Measurement|InchFinish Coating|Additional Information|UNSPSC Code|