Socket Set Screw Head Type Square Point Type Cup System of Measurement Inch Thread Size 7/8 In.-9 Overall Length 4 in Drive Type External Square Drive Size 7/8 in Material Steel Finish Plain Pack Size Small Pack Dimensional Standards ASME B18.6.2 Head Height 0.678 in Head Width 7/8 in Maximum Head Height 0.678 in Maximum Head Width 0.875 in Maximum Temperature 302 Degrees F Minimum Head Height 0.635 in Minimum Head Width 0.852 in Minimum Temperature -58 Degrees F