Nut Application Potable Water Fitting Material Brass Maximum Operating Pressure 300 psi Maximum Operating Temperature 250 Degrees F Overall Length 5/16 in Thread Size 7/16-24 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 1/4 in Standards NSF/ANSI 61 Annex G Compatible Tube Material Aluminum Copper Thermoplastic Fitting Connection Type Compression Hex Size 1/2 in Minimum Operating Temperature 65 Degrees F