Cam&groove coupling Alumninum. Size:1/2"-- 6", Type: A,B,C,D,E,F,DC,DP,DA,SA,AA, ... : DIN EN 14420-7-2005. Cam&groove Couplinghose CouplingUsed in a wide variety of applications for petroleum handling, chemical processing, dry ... /2", 2 , 21/2", 3", 4", 5", 6" 5) Type: A,B,C,D,E,F,DC,DP,DA,SA,AA ...