Nut Application Air Fitting Material Brass Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Overall Length 13/16 in Thread Size 1-18 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 3/4 in Series NTA Standards DOT FMVSS 571.106 SAE J1131 SAE J246 Fitting Connection Type Compression Hex Size 1 1/8 in Minimum Operating Temperature 40 Degrees F