Four Round to Four Flat Adapter Not Fitting

Updated 09/01/2026 | Published 08/27/2026

Products Featured in This Question

Adapter 4 Round to 4 Flat

(85)

$13.63

Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End

(150)

$11.54

Question:

I purchased this adapter for my pollak 4 pin round on my truck to convert to 4 pin flat and it does not fit. Do you sell one that fits the round 4 terminal outlet in the picture.

asked by: Kevin Z

Pollak 4 Round Connector
(click to enlarge)

Expert Reply:

Thanks for letting us help Kevin. The Adapter 4-Round to 4-Flat # 47465 is designed to fit common 4-pole round vehicle-side sockets like the Pollak Heavy-Duty 4-Pole Round Socket # PK11404. If you can send me a clear photo of the inside of your current 4-round socket, I'd be happy to take a closer look and see if I can identify what's causing the issue.

Another option would be to replace your existing vehicle-side socket with the # PK11404, which we know is compatible with the # 47465 adapter.

What type of equipment do you need the 4 flat connection for?

expert reply by: Christopher H