Front Ferrule Finish/Coating Colorless Dry Lubricant Fitting Material Steel Maximum Operating Pressure 7 600 psi Maximum Operating Temperature 800 Degrees F Specific Fitting Shape Front Ferrule Compatible Fitting Brands Swagelok Compatible Tube Outer Diameter 3/8 in Series A-LOK(R) Standards ASTM A108 QQ-S 637 Compatible Fitting Connection Type Compression Minimum Operating Temperature 20 Degrees F