Back Ferrule Finish/Coating Colorless Dry Lubricant Fitting Material Stainless Steel Material Grade 316 Maximum Operating Temperature 1 200 Degrees F Specific Fitting Shape Back Ferrule Compatible Fitting Brands Swagelok Compatible Tube Outer Diameter 3/8 in Series A-LOK(R) Standards ASME SA-479 ASTM A276 Type 316 BS970 316-S31 DIN 4401 Compatible Fitting Connection Type Compression Compatible Tube Material Stainless Steel Minimum Operating Temperature 425 Degrees F