This Dixon 30RDSSAP series adapter is used for connecting or extending pipes going in the same direction. It has female British Standard Pipe Parallel (BSPP) threads on one end (for connecting to male threaded pipes) and male National Pipe Taper (NPT) threads on the other end for connecting to female threaded pipes. It is made of stainless steel 316 for higher strength and greater corrosion resistance than stainless steel 304. This fitting includes a polytetrafluoroethylene (PTFE) gasket for resistance to chemicals, moisture, and high temperatures and is suitable for use in tanker truck chemical and fuel transport applications. Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size, and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness). Dixon Valve & Coupling Company manufactures pipe and hose fittings and accessories. The company, founded in 1916, is headquartered in Chestertown, MD.