4 Inch Type A Camlock Fitting – Brass cam and groove coupler &adapter are made according to standard A-A-59326(original standard Mil-C-27487).Camlock coupling provides a simple and reliable way to connect and disconnect the hose. During installation, no tools are needed, and the handle can be pressed by hand, which can save time, tools and manpower. Brass camlock suitable for conveying water, coolant, hydraulic oil, gasoline and petroleum products.