Do You Have a 7-Pole Round to 7-Way Blade Adapter
Updated 12/22/2025 | Published 12/21/2025
Products Featured in This Question
Question:
Hello, I am looking to adapt my female round 7 pin plug on my semi truck to the female 7 pin flat blade plug on my gooseneck for electric brakes. Is there such adaptor?
asked by: Brian T
Expert Reply:
Hey, Brian!
We do have just the adapter for you! We have the Pollak trailer connector adapter part # PK12-724. This adapter adapts 7-round pin to 7-way blade trailer connector seamlessly. I'll also include the other Pollak adapter part # PK12728. It's pinned the obisite of the first adapter. I wanted to mention it just in case I misunderstood how your pins were on your semi. Figured better safe than sorry.
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- 7 Round
- Plug Only
- Pollak
more information >
Continue Researching
- Article: Trailer Wiring Diagrams
- Q&A: Towing a Trailer with Electric Brakes with a Semi Tractor with Air Brakes
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Q&A: Wiring Instructions for the Tradesman Vaquero Hydraulic A-Frame Trailer Jack
- Q&A: Replacement Hub Needed for Lippert 122093 Hub on 5,200 lbs Axle
- Q&A: How to Identify Replacement Leaf Springs
- Q&A: Does Installing A Wiring Harness On A 2021 Jeep Wrangler JL Require A Wire Run To The Battery?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Semi Trailer Light Function Locations on Heavy Duty 7-Way Pin Connection
- Q&A: What is the Bolt Hole Pattern for Mounting the Curt Trailer Hitch Receiver # 13018
- Article: Trailer Maintenance Schedule
- Article: Trailer Lighting Requirements
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)