Manufacturer Part Number: 31334|Washer Type|Duty Type|Screw Size|1 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)|0.2500Hardness|Material Grade|5Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|1.0030Minimum Inside Diameter (mm)|1.00Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|Minimum Outside Diameter (mm)|Maximum Outside Diameter (mm)|1.65Maximum Outside Diameter (Decimal Inch)|1.6560Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|Maximum Inside Diameter (Inch)|1.0240System Of Measurement|InchFinish Coating|Zinc-PlatedAdditional Information|UNSPSC Code|