W5SWL Brand Premium Series TNC (RP)"Reverse Polarity" Female Bulkhead Crimp RF Radio Connector for RG-58 - by W5SWL Brand TNC RP Female Bulkhead Crimp Connector Fits RG-58 Series Cable Teflon Insulator, Gold Plated RF Pin, Nickle Plated Body IMPORTANT NOTE - RP or "Reverse Polarity" connectors do NOT fit standard connectors. A RP male end will have a female pin, and a RP female end will have a male pin. They do NOT fit standard connectors. by W5SWL Brand is Trademarked - Sold only by Dave's Hobby Shop and NO others. Premium Communications Connectors - not for Cable TV