Question: what is difference between 1/4 npt and 1/4 bsp?
Answer: Both NPT and BSP are pipe thread standards for screw threads used on pipes and pipe fittings to seal pipes. ... With NPT, the peaks and valleys of the threads are flat. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.