Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, Imperial, AF, SAE, Metric
5.5 mm, 9/16 ", 11/16 ", 26 mm, 35 mm
38.1, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide