Manufacturer Part Number: C52000812|Washer Type|Hi-CollarDuty Type|Screw Size|3/8 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)|0.1250Hardness|Material Grade|18-8Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|0.3820Minimum Inside Diameter (mm)|0.38Maximum Inside Diameter (mm)|Minimum Outside Diameter (Decimal Inch)|Minimum Outside Diameter (mm)|Maximum Outside Diameter (mm)|0.55Maximum Outside Diameter (Decimal Inch)|0.5530Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|Maximum Inside Diameter (Inch)|0.3930System Of Measurement|InchFinish Coating|Bright/UncoatedAdditional Information|UNSPSC Code|