Brass Metric Compression Fitting Application Air Lines Automotive Process Cooling Lines Fluid Transfer Lubrication Lines Water Lines Fitting Side A Connection Type BSPT Fitting Side B Connection Type Compression Fitting Side C Connection Type Compression Fitting Material Brass Fitting Side B Tube Outer Diameter 4 mm Fitting Side C Tube Outer Diameter 4 mm Thread Size A R1/8 System of Measurement Metric Maximum Operating Pressure 3 335 psi