... , Ground joint coupling, sandblast coupling, Kingcombination nipple, DIN2817 safety clamp, T-bolt superior clamp, double bolt clamp, whipcheck safetycable, washdown gun, etc. 1) Standard of our ... Guillemin coupling:>> Forging 2 StandardEN14420-3MaterialAluminiumCasting methodForgingSizes1/2" to 4" Hose clamp