TNC RP Waterproof Crimp Bulkhead Jacks , Gigatronix TN023161C06WPR,Cable Type: LBC100, RG174, RG188, RG316, TNC RP (Reverse Polarity) Crimp Bulkhead Jack - waterproof (IP68), 3 piece, Nickel Plated, Brass body, PTFE Dielectric