Cap, Application Gases, Oils, Fitting Connection Type Compression, Finish/Coating Zinc Plated, Fitting Material Steel, Fitting Tube Size Outer Diameter 1/2 in, Maximum Operating Pressure 6,000 psi, Maximum Operating Temperature 800 Degrees F, Specific Fitting Shape Cap, System of Measurement Imperial, Compatible Fitting Brands A-LOK, Fitting Thread Size 3/4-20, Series A-LOK(R), Standards NACE, NORSOK, Minimum Operating Temperature 20 Degrees F, Resistance Properties Corrosion- WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)