Female Coupling Application Gasoline Oils Potable Water Fitting Side A Connection Type Compression Fitting Side B Connection Type FNPT Fitting Material Brass Fitting Side A Tube Outer Diameter 1/8 in Maximum Operating Pressure 400 psi Maximum Operating Temperature 250 Degrees F Specific Fitting Shape Straight Adapter Fitting Side B Pipe Size 1/8 in Thread Size A 5/16-24 Thread Size B 1/8-27 System of Measurement Imperial Standards NSF/ANSI 61 Annex G