Compression Nut, Application Air, Fitting Material Brass, Maximum Operating Pressure 400 psi, Maximum Operating Temperature 250 Degrees F, Overall Length 1 1/4 in, Thread Size 11/16-20, Specific Fitting Shape Nut, System of Measurement Imperial, Compatible Tube Outer Diameter 1/2 in, Standards DOT FMVSS 571.106, SAE J246, Compatible Tube Material Annealed Copper, Fitting Connection Type Compression, Hex Size 13/16 in, Minimum Operating Temperature -65 Degrees F