Union Application Air Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Brass Fitting Side A Tube Outer Diameter 1/4 in Fitting Side B Tube Outer Diameter 1/4 in Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Overall Length 1 1/4 in Specific Fitting Shape Straight Union Thread Size A 7/16-24 Thread Size B 7/16-24 System of Measurement Imperial Standards DOT FMVSS 571.106 SAE