Nut Application Fuel Oils Fitting Material Brass Maximum Operating Pressure 400 psi Maximum Operating Temperature 275 Degrees F Overall Length 1/2 in Thread Size 1/2-24 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 1/4 in Compatible Fitting Brands A-LOK Series Vibra-Lok Standards ISO 6149 SAE J1926 Fitting Connection Type Compression Hex Size 9/16 in Minimum Operating Temperature 30 Degrees F Package Quantity 10