Tapered threads are NPT standard for the size listed Multitude of process uses and material types Temperature Range: -65° F to +250° F(-53°C to +121°C). Used With: Brass, bronze, copper, steel, aluminum and iron pipe. Tolerance: +/- .02 on all dimensions. Dimension Data can change without notice. Please call us when dimensions are critical. Conformance: Meets all ASME and SAE specs and standards Constructed of corrosion-resistant brass Not lead free Vibration: Fair