Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, Torx, AF, SAE
5/16 ", 9/16 ", 3/16 ", 5.5 mm, 1-1/2 "
1/4, 1/2, 1-1/2, 3/4, 3/8
6.35, 9.53, 38.1, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide