Manufacturer Part Number: HS-20|Material|High Speed SteelSerration Type|DiamondAttachment Style|ThreadedThread Size|8-32Finish|BlackTooth Pattern|Diamond SerrationMount Type|Tooth Grade|Extra FineOverall Diameter|0.25inOverall Height|0.38inFlat Width|Chamfer Length|Carbide Diameter|Flat Position|Diameter (Inch)|1/4Height (Inch)|3/8For Socket Head Cap Screw Size|PSC Code|UNSPSC Code|