Union Tee, Application Gas, Oil, Fitting Side A Connection Type Compression, Fitting Side B Connection Type Compression, Fitting Side C Connection Type Compression, Fitting Material Stainless Steel, Fitting Side A Tube Outer Diameter 3/8 in, Fitting Side B Tube Outer Diameter 3/8 in, Fitting Side C Tube Outer Diameter 3/8 in, Thread Size A 9/16-20, System of Measurement Imperial, Material Grade 316, Maximum Operating Pressure 10,000 psi, Maximum Operating Temperature 605 Degrees F With a compression design that allows for easy assembly this PARKER CPI(TM) union tee provides a leaktight seal for high pressure, vibration, and vacuum in gas or liquid applications. Features a single-ferrule design creates a dynamic seal on tube and body, with close tolerance of nut and body dimensions for accu.