... standard;Quality Control: ISO 9001-2008;Application: Automobile, engineering Machinery, Lathe, Machinery, Metallurgy, Petroleum, mine, construction, chemical industry, shipbuilding, spacecraft, military ... , EN, GB etc2) Metric Fitting Flat Seal Fitting, Mulit-seal fitting, spherical seal fitting, 60° Cone seal fitting, 74° cone seal fitting, 24°cone O-ring ...