Back Ferrule Fitting Material Stainless Steel Material Grade 316 Maximum Operating Pressure 8 100 psi Maximum Operating Temperature 1 200 Degrees F Specific Fitting Shape Back Ferrule System of Measurement Metric Compatible Fitting Brands LET-LOK Swagelok Compatible Tube Outer Diameter 8 mm Series Let-Lok Standards ASME ASTM-A CE MIL-F-18866 SAE Compatible Fitting Connection Type Compression Minimum Operating Temperature 425 Degrees F