Bulkhead Union, Fitting Material Brass, Flare Angle 45 Degrees , Application Air, Fitting Side A Connection Type Compression, Fitting Side B Connection Type Flared, Fitting Side A Tube Outer Diameter 1/2 in, Fitting Side B Tube Outer Diameter 1/2 in, Fitting Thread Size 11/16-20, Hex Size 7/8 in, Maximum Operating Pressure 150 psi, Maximum Operating Temperature 200 Degrees F, Overall Length 2 3/4 in, Specific Fitting Shape Straight Bulkhead Union, Standards SAE J1131, SAE J246