Instrumentation Fittings Application Gas Hydraulic Tubing Systems 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 C 9/16-20 Thread Size B 9/16-20 Thread Size A 9/16-18 System of Measurement Imperial