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 5/8 in Fitting Side B Tube Outer Diameter 5/8 in Maximum Operating Pressure 3 250 psi Maximum Operating Temperature 450 Degrees F Overall Length 1 5/8 in Specific Fitting Shape Straight Connector Compatible Fitting Brands Air-Way Parker Thread Size A 7/8-14 Thread Size B 7/8-14