Pollak 12-726 4-Way Flat to 7-Way Heavy-Duty Round Pin Socket Adapter Harness

The Pollak 12-726 is a specialized conversion harness designed for vehicle owners who need to transition from a standard 4-way flat output to a 7-pole heavy-duty round pin socket. This is the ideal solution for light-duty trucks or SUVs that need to interface with commercial, agricultural, or heavy-duty utility trailers using the traditional round-pin electrical standard.

Built for Rigorous Environments Unlike standard plastic adapters, the 12-726 features a glass-filled nylon socket that is impact-resistant and completely non-corrosive. The harness is shielded by a protective split-loom conduit to prevent wire chafing and environmental wear. The socket is designed with a spring-loaded cover and a high-retention stay-tight notch to ensure your trailer plug remains securely connected over the roughest terrain.

Full Functionality Integration This adapter allows you to maintain your primary lighting via the 4-way flat plug while providing additional wire leads to power critical auxiliary systems, including:

• Electric Trailer Brakes

• Auxiliary 12V Power/Battery Charge

• Backup/Reverse Lights

• Independent Grounding

Key Features & Benefits:

• Commercial Conversion: Easily adapts 4-Way flat wiring to a 7-Way Heavy-Duty Round Pin (Commercial Style) socket.

• Enhanced Durability: Weather-resistant, glass-filled nylon housing that won’t rust or pit like die-cast metal.

• Secure Connection: Positive-latching lid prevents accidental disconnection during transit.

• Versatile Application: Perfect for connecting utility, horse, or agricultural trailers to standard vehicle wiring.

• Professional Grade: Manufactured by Pollak, the industry leader in heavy-duty electrical towing components.

Specifications:

• Manufacturer: Pollak

• Part Number: 12-726 (also replaces 12-726P)

• Input: 4-Way Flat (Lighting) + 4-Wire Leads (Auxiliary)

• Output: 7-Pole Round Pin (Female Socket)

• Material: Heavy-Duty Glass-Filled Nylon

• Mounting: Standard 7-way mounting bracket required (sold separately)