Manufacturer Part Number: 30770|Washer Type|Duty Type|Screw Size|1/4 inMaterial|Silicon BronzeThread Size|Inside Diameter (mm)|Inside Diameter (Decimal Inch)|0.2520Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|0.4870Thickness (mm)|Thickness (Decimal Inch - 4 Decimals)|0.0620Hardness|Material Grade|Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|0.2540Minimum Inside Diameter (mm)|0.25Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|0.4890Minimum Outside Diameter (mm)|0.48Maximum Outside Diameter (mm)|0.49Maximum Outside Diameter (Decimal Inch)|0.4910Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|ASME B18.21.1Maximum Inside Diameter (Inch)|0.2620System Of Measurement|InchFinish Coating|Additional Information|UNSPSC Code|