This fitting meets American Society for Testing and Materials (ASTM) B584 and American Society of Mechanical Engineers (ASME)/American National Standards Institute (ANSI) B16 specifications 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. Buy 1-1/2 Countersunk Square Head Cleanout Plug with 1/4-20 Tap Brass can be connected to copper, brass, plastic, aluminum, and welded steel. The Anderson Metals countersunk plug with square drive pipe fitting is made of brass and has a male National Pipe Taper (NPT) threaded connection. Meets specifications ASTM B584 and ASME/ANSI B16 for quality assurance Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F) Anderson Metals Fitting Anderson Metals 756115-08 Pipe Fitting, Countersink Plug, Lead-Free Brass Countersunk Plug It has male NPT threads for connecting to a female threaded pipe, creating a tighter seal than straight threads. Countersunk plug with a square drive for closing the end of a pipe or fitting Male Brass Countersink Pipe Plug - Brass Tubes, Copper Pipes The company, founded in 1951, is headquartered in Kansas City, MO.