Male Coupling Application Gasoline Oils Potable Water Fitting Side A Connection Type Compression Fitting Side B Connection Type MNPT Fitting Material Brass Fitting Side A Tube Outer Diameter 1/4 in Maximum Operating Pressure 300 psi Maximum Operating Temperature 250 Degrees F Specific Fitting Shape Straight Adapter Fitting Side B Pipe Size 1/4 in Thread Size A 7/16-24 Thread Size B 1/4-18 System of Measurement Imperial Standards NSF/ANSI 61 Annex G