KP41 circular small connectors made of metal shell, It can be useed in the water-proof place. These connectors have the features of lower contact resistance, anti-libration, shock proof, water proof and strong seal etc. They are widely used for the electrical connection between electrical equipment. It has protection IP68. Meet CE, RoHs. It is similar as Binder's 715 series and 766 series. Plug connect with receptacle at M12X1 screw.