Manufacturer Part Number: C39066|Thread Size|5/8-18Thread Length (Inch)|2-1/2Thread Length (mm)|Thread Length (Decimal Inch)|Thread Standard|UNFLength (Inch)|2-1/2Drive Type|HexFlange Type|SmoothFlange Diameter (Decimal Inch)|1.3281Flange Diameter (mm)|Flange Diameter (Inch)|1-21/64Material|Alloy SteelMaterial Grade|8Thread Style|Partially ThreadedDrive Size (mm)|Drive Size|Standards|IFI 111; SAE J429Length Measurement Type|Length Under HeadFastener Standard|IFI 111; SAE J429Full or Partial Threading|Partially ThreadedFinish Coating|Bright/UncoatedSystem Of Measurement|InchLength (mm)|Product Service Code|UNSPSC Code|31161626