Internal Hex, External Hex, TX, Hex, External Torx
Imperial, Metric, AF, Torx, SAE
11/32 ", 3/16 ", 9/16 ", 5/16 ", 11/16 "
2-1/2, 1-1/2, 3/8, 3/4, 1
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide