The Merit Brass square head cored plug is chrome-plated brass pipe fitting with male National Pipe Taper (NPT) threads for closing the end of a pipe. The plug inserts into female pipes or fittings and connects with NPT threads, which create a tighter seal than straight threads. It has a square head for increased leverage and use with a wrench during installation and disassembly. Made of brass with a high gloss, chrome-plated finish, this plug is easier to clean than regular brass and more corrosion resistant than stainless steel. This fitting meets standards ASTM B-584, ANSI B 1.20.1, and ANSI B 16.15 for quality assurance. 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). Merit Brass manufactures pipe nipples following ISO 9001 standards for quality assurance. The company, family-owned since 1937 and headquartered in Cleveland, OH, distributes pipe fittings in the United States and Canada.