NPSM Female Swivel Adapter
NPSM Female Swivel Adapter are available as standard in Brass and 316 Stainless Steel. Pipe Fittings can also be supplied in other materials including Monel®, Hastelloy® C276, Inconel®, Incoloy®, Duplex, Super Duplex and Titanium, as well and in special shapes. While the standard materials are 316 stainless steel, brass and carbon steel, we can also manufacture these fittings in other materials to meet your company’s needs. The basic fitting capabilities show the fittings will stand up during prolonged exposure to temperatures as high as 800°F. Those ratings are dependent upon the design and whether the fitting is 316 stainless steel or brass. NPSM Female Swivel Adapter made of 316 stainless steel are heat code traceable for the benefit of your operation.
All exposed threads of NPSM Female Swivel Adapter protected with plastic caps to prevent damage and packed in sealed, clear plastic bag for cleanliness.
What are NPSM Threads ?
The NPSM (National Pipe Straight Mechanical) Female Swivel Adapter was designed to eliminate hose stress from twisting during asssembly & reduce the number of different hose fittings required. The NPSM female pipe swivel seals on a 30 deg seat (flare) & is visible down inside of the swivel nut. This swivel nut is permanently attached to the body & mates with a male pipe thread that has a 30 deg seat (chamfer) machined into the end of it. The Thread brings both 30 deg seats (Flare & Chamfer) together creating a Metal-to-Metal seal.
The National Standard Free-Fitting Straight Mechanical Pipe Thread (NPSM) piping convention refers to pipe thread that is not tapered. NPSM pipe threads do not seal as effectively as NPT threads. NPSM is not typically used to transport water or gases without an O-ring. Instead, they are used as structural pipes unless a sealer like an O-ring or tape is applied.
NPSM pipe threads do not taper, they do not form as effective a seal as NPT or BSP threads. National Pipe Straight Mechanical, that are designed to screw together and cause interference at the roots and crests of the threads. The thread deformations caused by the interference fit and the wrench tightening is designed to make a dry mechanical seal. Theses Fittings are not used with liquids.