Dormer Straight Flute Machine Tap, Series: E531, Measurement System: Imperial, BSW, 1/8-40, 3 Flutes, HSS, Bright, Right Hand Cutting, 12.5 mm Thread Length, 48 mm Overall Length, 3.15 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