Union Butterfield Union Butterfield Spiral Flute Tap, Fast High Performance, Measurement System: Metric, UNF, M18x1.5, Semi-Bottoming Chamfer, 3 Flutes, HSS, TiCN Coated, Class of Fit: 6H/D7, Right Hand Cutting, 21 mm Thread Length, 110 mm Overall Length, 0.542 in Shank Dia, Right Hand Flute Direction, H6 Thread Limit, Alloy Steel, Aluminum, Aluminum Alloys, Brass, Carbon Steel, Copper, Copper Alloys, Nickel, Nickel Alloys, Stainless Steel, Steel, Structural Steel, Titanium and Titanium Alloys Material Application, No Through Coolant (Yes/No)