Manufacturer Part Number: MP42458-20|Washer Type|Duty Type|Screw Size|M20Material|Spring SteelThread Size|Inside Diameter (mm)|20.20Inside Diameter (Decimal Inch)|Outside Diameter (mm)|33.60Outside Diameter (Decimal Inch - 4 Decimals)|Thickness (mm)|4.00Thickness (Decimal Inch - 4 Decimals)|Hardness|44-51 HRCMaterial Grade|8Military 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)|33.60Maximum Outside Diameter (Decimal Inch)|Maximum Thickness (Decimal Inch)|Maximum Thickness (mm)|4.00Fastener Standard|DIN 127Maximum Inside Diameter (Inch)|System Of Measurement|MetricFinish Coating|ZincAdditional Information|UNSPSC Code|31161801