Tube Insert Application Air Air Brake Compatible Fitting Connection Type Compression Compatible Tube Outer Diameter 5/8 in Compatible Tube Inner Diameter 1/2 in Fitting Material Brass Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Overall Length 13/16 in Specific Fitting Shape Tube Insert System of Measurement Imperial Standards DOT/SAE J1402A Minimum Operating Temperature 40 Degrees F