UNION, COMPRESSION, SMALL HEX, Application Air, Fuel, Hydraulic Oil, Fitting Side A Connection Type Compression, Finish/Coating Zinc Trivalent, Fitting Material Steel, Fitting Side A Tube Outer Diameter 1/4 in, Fitting Side B Tube Outer Diameter 1/4 in, Maximum Operating Pressure 5,250 psi, Maximum Operating Temperature 450 Degrees F, Overall Length 1 3/16 in, Specific Fitting Shape Straight Connector, Compatible Fitting Brands Air-Way, Parker, Thread Size A 7/16-20, Thread Size B 7/16-20