NPT stands for National Pipe Thread, a U.S. standard for tapered threads used on pipes and fittings, including those made of PVC (polyvinyl chloride). These threads are designed to create a tight, leak-proof seal when joining pipes or fittings together. NPT threads have a taper to them, which means that the diameter of the thread gets smaller as you move...
ASTM D2464 is a standard specification established by the American Society for Testing and Materials (ASTM) for threaded poly(Vinyl Chloride) (PVC) plastic pipe fittings, Schedule 80, related to all male MNPT and female FNPT threaded fittings. These D2464 NPT threaded fittings are used in pressure systems, where threaded connections are required. The standard specifies the requirements for the material, dimensions...
