Overview Reviews Product Description BSP = BSPP = BSPF This is a parallel thread BSP 1-1/2"-11 is 1.882" across the threads Product Videos Custom Field Product Reviews Write a Review Write a Review × BSP 1-1/2"-11 DIE - 4" O.D. Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *