Nut Application Fluids Gases Finish/Coating Zinc Plated Fitting Material Steel Maximum Operating Temperature 500 Degrees F Overall Length 23/32 in Thread Size 7/16-20 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 1/4 in Series Ferulok Standards SAE J514 Fitting Connection Type Compression Hex Size 9/16 in Minimum Operating Temperature 65 Degrees F