GadKo Phone / Data RJ12 Crimp Connectors for Flat Cable, 6P6C, 50 Pieces GadKo is the only authorized dealer of GadKo branded products. RJ12 plugs are a type of plug typically used for carrying telephone and data signals. 6P6C means that the contacts on these plugs have 6 positions in which are placed 6 gold plated contacts; a standard for RJ12 jacks. These plugs are also designed for use with stranded wire. They come in a bag of 50.