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 1/4 in, Fitting Side B Tube Outer Diameter 1/4 in, Fitting Thread Size 7/16-24, Hex Size 9/16 in, Maximum Operating Pressure 150 psi, Maximum Operating Temperature 200 Degrees F, Overall Length 1 7/8 in, Specific Fitting Shape Straight Bulkhead Union, Standards SAE J1131, SAE J246