Double Ferrule Nut Application Air Natural Gas Non-Potable Water Fitting Material Brass Maximum Operating Temperature 400 Degrees F Overall Length 11/16 in Thread Size 3/4 Specific Fitting Shape Double Ferrule Nut System of Measurement Imperial Compatible Tube Outer Diameter 1/2 in Compatible Fitting Brands Swagelok Series A-LOK(R) Standards ASTM B16 Alloy 360 ASTM B453 Alloy 345 CA-345 CA-360 QQ-B 626 Alloy 360 Fitting Connection Type Compression Hex Size 7/8 in