Answer
Jan 06, 2025 - 08:47 AM
NPSM (National Pipe Straight Mechanical) thread size refers to a type of straight pipe thread used primarily for mechanical joints that do not require a pressure-tight seal. Unlike tapered threads, NPSM threads are parallel and are typically used in applications where the seal is achieved with a gasket or O-ring. They are specified by their nominal pipe size, which corresponds to the inner diameter of the pipe, and follow the ANSI/ASME B1.20.1 standard.
