Dormer Straight Flute Machine Tap, Series: E531, Measurement System: Imperial, BSW, 1/2-12, 3 Flutes, HSS, Bright, Right Hand Cutting, 22 mm Thread Length, 89 mm Overall Length, 9 mm Shank Dia, Alloy Steel, Aluminum Alloy, Brass, Bronze, Carbon Steel, Cast Iron, Copper, Copper Alloy, Hardened Steel, Plastic, Steel, Structural Steel and Thermosetting Plastics Material Application, Medium Thread Limit