Size: 1/2"-4"
Spce: A B C D E F DC DP 
Standard: MIL-C-27487/ DIN 2828
Material: SS, aluminium, brass, nylon, PP
Thread: BSP, NPT
Seal: NBR, EPDM, VITON
There are many advantages of cam and groove couplings in industries: 
1)Cam and groove coupling works by inserting the grooved coupling into the cam coupling by simply closing the camlock arms.Connecting pipes and hoses with cam and groove coupling is considered as the safest way of connecting two pipes or hoses during the transfer of fluids. 
2)Cam lock couplings will prevent any kind of leakage and is airtight. Safety pins will prevent any kind of leakage during accidental disconnection of pipes or hoses. Cam lock couplings are usually made of aluminum, brass, stainless steel and polypropylene.
3)A Camlock coupling is available in various sizes ranging from 1/2"-4" and includes a wide variety of gasket material.
Various types of cam and groove couplings are:
a)Brass cam and groove couplings - that works efficiently at high temperatures.
b)Aluminum cam and groove couplings yield castings with better strength and finer grain structure. 
c)Stainless steel couplings are durable and non-corrosive and they are investment cast.
d)Polypropylene cam and groove couplings are made out of glass reinforced polypropylene, which is acid resistant.