The Anvil waste nut is a class 150 malleable iron pipe fitting with female National Pipe Taper (NPT) threads for connecting to pipes or fittings and bolt holes for securing pipe to floors or walls. It has NPT threads for creating a tighter seal than straight threads and bolt holes for connecting to flat surfaces. The waste nut is made of malleable iron, which has high tensile and has a galvanized finish that resists rust in water, air and steam applications. This class 150 fitting meets standards ASTM A-197, ASME B 1.20.1 and ASME B 16.3 for quality assurance. Class is a standard relating to tolerance, construction, dimension and wall thickness, but it is not a direct measurement of maximum working pressure. 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.