QC Hydraulics is a manufacturer of NPT hydraulic fittings and NPSM adapters, which is most popular in North American Market.
What’s NPSM threads?
National Pipe Straight Mechanical (NPSM) has a straight thread, unlike NPT, which is tapered. NPSM is sometimes used for fluid power systems and male NPTF pipes will seal with an NPSM female pipe. … Being straight, NPSM pipes do not seal as effectively as tapered NPT pipes do.
What’s NPT thread?
NPT stands for National Pipe Tapered threads, also known as ANSI/ASME B1.20.1 pipe threads. It is a U.S. standard for measuring tapered threads on threaded pipes and fittings. Threaded pipes can give an effective seal for pipes using hydraulic fluids. Sometimes referred to as MPT (male pipe threads), NPT threads are not interchangeable with NPS (National Pipe Straight) threads. Unlike straight threads found on a bolt, a taper thread will pull tight, making a closer seal. A sealant compound or PTFE (Polytetrafluoroethylene) tape must be used to ensure a leak-free seal.
American National Standard Pipe Thread standards, often called national pipe thread (NPT) standards for short, are U.S. national technical standards for screw threads used on threaded pipes and pipe fittings.
What’s the difference between NPSM & NPT threads?
NPT thread is a tapper thread with 60 degree angle, which is a seal thread; NPSM is a straight thread with 60 degree angle too, but NPSM can not form a seal using its thread, it needs an O-ring to form a seal. NPT pipes are also known as male pipe, female pipe, pipe thread, female pipe thread and male pipe thread. NPSM is sometimes also known as NPS. Threaded pipes such as NPT seal tightly and are used to move liquids and gases. NPSM is not typically used to transport water or gases without an O-ring.