Type "E" aluminum male camlock coupler to hose shank. Under no circumstances should cam and groove couplings be used for compressed air or steam service!
Warning: Aluminum cam & groove fittings should not be mixed with plastic fittings.
How it works:

To make a connection, simply slide the male camlock adapter into a female camlock coupling and with normal hand pressure, press the cam levers down.
Uncoupling is as quick and simple as coupling. Just lift the cam arms and remove the adapter.
Cam and groove couplings, also called camlock fittings or quick connect fittings, are used in most industries as a hose connection to avoid leakage. The cam lock type of coupling is popular because it is considered to be a simple and economical way to reconnect and disconnect.
Cam and Groove Couplings Industries:

Chemical
Sanitary
Government
Storage
Dry bulk
Petroleum
Applications:

Reverse osmosis systems
Water treatment
Water transport
Irrigation
Waste / vacuum trucks
Hydraulic oil, coolants, gasoline and petroleum products
Salt water
Waste water
Chemical movement & storage