Overview Reviews Product Description HSS Ground thread Bright finish British Standard Parallel Fixed - 55° degree thread form This thread is not tapered (parallel) and needs a gasket or seal to be gas/liquid tight. Pipe taps are the nominal size of the pipe fitting and not the actual size of the tap Clarkson Osborn Catalog Product Videos Custom Field Size 1-3/4"-11 BSPF Flute length 39mm Overall length 132mm Package quantity/sold as each 1 Product Reviews Write a Review Write a Review × Clarkson-Osborn 1-3/4"-11 BSPF HSS British Standard Parallel Pipe Tap CT13028 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *