Front Ferrule Finish/Coating Colorless Dry Lubricant Fitting Material Brass Maximum Operating Temperature 400 Degrees F Specific Fitting Shape Front Ferrule Compatible Fitting Brands Swagelok Compatible Tube Outer Diameter 5/8 in Series A-LOK(R) Standards ASTM B16 Alloy 360 ASTM B453 Alloy 345 CA-345 CA-360 QQ-B 626 Alloy 360 Compatible Fitting Connection Type Compression Minimum Operating Temperature 40 Degrees F