Internal Torx, External Hex, Internal Hex, Hex, TX
Torx, AF, Metric, Imperial, SAE
13/16 ", 7/16 ", 7/8 ", 15 mm, 9/16 "
3/4, 1-1/2, 2-1/2, 1/2, 3/8
6.35, 9.53, 25.4, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Oxide, Black Phosphate