Internal Hex, External Hex, Internal Torx, TX, Hex
Torx, AF, Imperial, Metric, SAE
7/32 ", 9/32 ", 7/16 ", 25 mm, 29 mm
3/8, 1, 2-1/2, 1-1/2, 3/4
19.05, 25.4, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide