Internal Hex, External Hex, TX, Hex, External Torx
Torx, Imperial, AF, SAE, Metric
8 mm, 15/16 ", 13/16 ", 5/16 ", 5/8 "
3/8, 1, 2-1/2, 3/4, 1-1/2
19.05, 25.4, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide