Brass Compression Air Brake Hose Ends Application Air Brake Fitting Side A Connection Type Compression Fitting Side B Connection Type MNPT Fitting Material Brass Fitting Side A Tube Outer Diameter 1/2 in Thread Size B 3/8 System of Measurement Imperial Maximum Operating Pressure 400 psi Maximum Operating Temperature 250 Degrees F Overall Length 5 in Specific Fitting Shape Straight Connector Fitting Side B Pipe Size 3/8 in Standards DOT FMVSS 571.106 SAE J1402