Nut Application Fluids Gases Finish/Coating Zinc Plated Fitting Material Steel Maximum Operating Temperature 500 Degrees F Overall Length 15/16 in Thread Size 7/8-14 Specific Fitting Shape Nut System of Measurement Imperial Compatible Tube Outer Diameter 5/8 in Series Ferulok Standards SAE J514 Fitting Connection Type Compression Hex Size 1 in Minimum Operating Temperature 65 Degrees F