NPT (EXTERNAL) PACK OF 10 INSERTS
NPT stands for National Pipe Taper, where "taper" is the English term for cone or taper. According to the NPT thread table, the thread is therefore a conical or tapered pipe thread that is not sealing in the thread. It has a flank angle of 60°. The conical shape of the NPT thread is defined by an angle of 1°47'.
