Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
5 mm, 3/16 ", 5/8 ", 23 mm, 9 mm
1/4, 1, 1-1/2, 2-1/2, 3/4
38.1, 6.35, 19.05, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide