Instrumentation Fittings Application Gas Hydraulic Tubing Systems Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Side C Connection Type MNPT Fitting Material Stainless Steel Fitting Side A Tube Outer Diameter 1/4 in Fitting Side B Tube Outer Diameter 1/4 in Thread Size C 7/16-20 Thread Size B 1/4-18 Thread Size A 7/16-20 System of Measurement Imperial Compatible Fitting Brands Parker A-LOK Swagelok Material Grade 316