Insert Application Air Air Brake Compatible Fitting Connection Type Compression Compatible Tube Outer Diameter 3/4 in Compatible Tube Inner Diameter 5/8 in Fitting Material Brass Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Overall Length 1 7/32 in Specific Fitting Shape Tube Insert System of Measurement Imperial Standards DOT FMVSS 571/189 SAE Insert Diameter 523/1000 in Minimum Operating Temperature 40 Degrees F Package Quantity 10