External Torx, Internal Hex, External Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
9/32 ", 3/4 ", 5/16 ", 3/16 ", 7/16 "
1-1/2, 3/4, 2-1/2, 3/8, 1/2
38.1, 6.35, 19.05, 12.5, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Oxide, Black Phosphate