Manufacturer Part Number: 47419|Washer Type|Hi-CollarDuty Type|Screw Size|M20Material|SteelThread Size|Inside Diameter (mm)|Inside Diameter (Decimal Inch)|Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|4.50Thickness (Decimal Inch - 4 Decimals)|Hardness|Material Grade|2Military Specification|Does Not Meet Military SpecificationsStandards|Minimum Inside Diameter (Decimal Inch)|Minimum Inside Diameter (mm)|20.20Maximum Inside Diameter (mm)|21.20Minimum Outside Diameter (Decimal Inch)|Minimum Outside Diameter (mm)|Maximum Outside Diameter (mm)|30.60Maximum Outside Diameter (Decimal Inch)|Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|Fastener Standard|DIN 7980Maximum Inside Diameter (Inch)|System Of Measurement|MetricFinish Coating|Bright/UncoatedAdditional Information|UNSPSC Code|31161801