Cap, Application Gases, Oils, Fitting Connection Type O-Ring Face Seal, Fitting Material Stainless Steel, Fitting Tube Size Outer Diameter 1/4 in, Material Grade 316, Maximum Operating Pressure 9,200 psi, Maximum Operating Temperature 250 Degrees F, Specific Fitting Shape Cap, System of Measurement Imperial, Compatible Fitting Brands Seal-Lok, Fitting Thread Size 9/16-18, Series Seal-Lok, Standards SAE J1453, Minimum Operating Temperature 30 Degrees F