Do You Have a 7-Pole Round to 7-Way Blade Adapter
Updated 01/19/2026 | Published 12/21/2025
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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 opposite 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.
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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
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Gwendolyn Y.
1/19/2026
Hey Brian, how did things turn out with the Pollak adapter for your semi truck and gooseneck connection? Your update could make it easier for the next person trying to match those plug types.