Pollak 12-742 7-Way Heavy-Duty Round Pin to 4-Way Flat Trailer Adapter

The Pollak 12-742 is a rugged, professional-grade adapter designed for drivers who need to tow a standard light-duty trailer with a vehicle equipped for heavy-duty service. This compact tool instantly converts a 7-pole heavy-duty round pin socket (commercial style) into a standard 4-way flat connector, allowing you to power the essential lighting on utility trailers, boat trailers, and cargo haulers.

Manufactured by Pollak, the industry leader in heavy-duty electrical components, the 12-742 is built to endure. The housing is constructed from high-impact, glass-filled nylon, making it completely non-corrosive and resistant to the harsh chemicals, road salt, and moisture found in commercial environments.

There is no need for time-consuming rewiring or permanent vehicle modifications. The 12-742 features a full-length shell design that ensures a positive, secure latch into your truck's 7-way round socket. Once connected, it provides seamless electrical flow for your trailer’s tail lights, turn signals, and brake lights.

• Instant Conversion: Connects a 4-Way Flat trailer plug to a 7-Way Heavy-Duty Round Pin vehicle socket.

• Non-Corrosive Housing: Glass-filled nylon shell is impact-resistant and won’t rust or pit like metal adapters.

• Standard Circuitry: Supports all basic lighting functions including Tail, Stop, and Turn signals.

• Compact & Portable: Small enough to store in your glovebox or tool tray for on-the-go versatility.

• Secure Fit: Designed with a retention notch to stay firmly seated in the vehicle-side socket during transit.