Manufacturer Part Number: HS-81|Material|High Speed SteelSerration Type|Attachment Style|ThreadedThread Size|1/4-28Finish|Tooth Pattern|Diamond SerrationMount Type|Tooth Grade|CoarseOverall Diameter|Overall Height|Flat Width|Chamfer Length|Carbide Diameter|Flat Position|Diameter (Inch)|1Height (Inch)|3/8For Socket Head Cap Screw Size|PSC Code|UNSPSC Code|