Manufacturer Part Number: 31331|Washer Type|Duty Type|Screw Size|5/8 inMaterial|SteelThread Size|Inside Diameter (mm)|Inside Diameter (Decimal Inch)|Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|Thickness (Decimal Inch - 4 Decimals)|0.1560Hardness|Material Grade|5Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|0.6280Minimum Inside Diameter (mm)|0.62Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|Minimum Outside Diameter (mm)|Maximum Outside Diameter (mm)|1.07Maximum Outside Diameter (Decimal Inch)|1.0730Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|Maximum Inside Diameter (Inch)|0.6410System Of Measurement|InchFinish Coating|Zinc-PlatedAdditional Information|UNSPSC Code|