Interstate Pneumatics FB808 1/2 Inch NPT Male x 1/2 Inch NPT Female Brass Hex Adapter Threads: 1/2 inch NPT Male x 1/2 inch NPT Female - Machined (Provides seal tight threads) Temperature Range: -65 F to 250 F Maximum Operating Pressure: 250 PSI Conformance: ASME, SAE, NPT Material: Brass - Excellent strength and ductility, corrosion resistance, low magnetic permeability