Manufacturer Part Number: LWHIS1250USA-01|Washer Type|Duty Type|Screw Size|1-1/4 inMaterial|Spring SteelThread Size|Inside Diameter (mm)|Inside Diameter (Decimal Inch)|1.2540Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|Thickness (Decimal Inch - 4 Decimals)|0.3840Hardness|Material Grade|8Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|1.2540Minimum Inside Diameter (mm)|1.25Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|Minimum Outside Diameter (mm)|Maximum Outside Diameter (mm)|2.10Maximum Outside Diameter (Decimal Inch)|2.1040Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|Maximum Inside Diameter (Inch)|1.2800System Of Measurement|InchFinish Coating|ZincAdditional Information|UNSPSC Code|