Hydraulic Brake Fittings Application Hydraulic Fluid Fitting Side A Connection Type Inverted Flare Fitting Side B Connection Type Inverted Flare Fitting Side C Connection Type MNPT Finish/Coating Nickel-Plated Fitting Material Brass Fitting Side A Tube Outer Diameter 3/16 in Fitting Side B Tube Outer Diameter 3/16 in Thread Size C 3/8-24 Thread Size B 9/16-18 Thread Size A 9/16-18 System of Measurement Imperial Maximum Operating Pressure 125 psi