Regal Cutting Tools 008784AS Interrupted Thread Pipe Taps; Thread Size (Inch): 1-1/2 - 11-1/2 in; Thread Standard: NPT; Material: High Speed Steel; Number of Flutes: 7.0; Threads Per Inch: 11.5; Square Length: 1 in; Projection: 0.6990 in; Finish: Bri