Overview Reviews Product Description HSS General purpose British standard taper pipe (BSTP) - 55° degree thread form This thread is tapered, with an "interference" fit, unlike BSP, it needs no seals or gaskets Used to create external pipe and conduit threads. Clarkson Osborn Catalog Product Videos Custom Field Size 1"-11 BSPT Outer diameter 3" Package quantity/sold as each 1 Product Reviews Write a Review Write a Review × Clarkson-Osborn 1"-11 BSPT x 3" HSS Round Die TA27564 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *