A fitting is any machine component, piping or tubing part that can attach or connect two or more larger parts. Examples are couplings, compression fittings, and piping and plumbing fittings. 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. They include both tapered and straight thread series for various purposes including rigidity, pressuretight sealing, or both. The various types are each named with a symbol and a full name examples of the symbols include NPT, NPS, NPTF, NPSC, and others. Features. 0.37 CC x 0.5 NPT Straight Fitting. Made with high quality materialSpecifications. Length 0.8 in / 2.03 cm. Width 1.5 in / 3.81 cm. Height 0.8 in / 2.03 cm. Size 0.37 CC x 0.5