Nut Application Air Natural Gas Non-Potable Water Fitting Material Brass Maximum Operating Pressure 3 500 psi Maximum Operating Temperature 400 Degrees F Overall Length 15/32 in Thread Size 3/16 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 3/16 in Compatible Fitting Brands Swagelok Series CPI(TM) Standards ASTM 31.3 Compatible Tube Material Plastic Fitting Connection Type Compression Hex Size 1/2 in