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