Cam&groove coupling Alumninum. Size:1/2"-- 6", Type: A,B,C,D,E,F,DC,DP,DA,SA, ... AA, Standard: DIN EN 14420-7-2005. Cam&groove CouplingAluminum Cam Lock CouplingUsed ... ", 11/2", 2 , 21/2", 3", 4", 5", 6" 5) Type: A,B,C,D,E,F,DC,DP,DA,SA ... to customers’ requirements.10) We are qualified member of NFPA. cam lock coupling