Bargman® 51-20036 - 4-Flat to 5-Flat Adapter

52 reviews / Item # mpn1709050
Bargman® - 4-Flat to 5-Flat Adapter
Bargman® - 4-Flat to 5-Flat AdapterBargman Authorized Dealer
In Stock (9) - Ships within 24 to 48 hours
Universal Fit
Fitment Notes:
  • Not Vehicle Specific
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Bargman Accessories

Universal 4-Flat to 5-Flat Adapter by Bargman®. Wire up your tow vehicle and trailer with whatever it takes to get your trailer lights on, the electric brakes slowing down, and the trailer battery charging. From simple wiring connectors, to connectors and harness that lets you plug directly into your tow vehicle harness, to adapters that let your 3-wire car turn signals successfully operate your 2-wire trailer lights, we have the electrical solutions for your towing needs. One-year warranty



  • Plug and Play T-harnesses to connect to vehicle wiring
  • Trailer wiring connectors, for both truck and trailer
  • 4- 5- 6- and 7-pin trailer connectors
  • Quick and easy to install

Wiring for your trailer can be as simple as plugging in a premade harness to your truck’s rear lights, totally brainless. If you aren’t fortunate enough to have a truck that we have a t-harness for, well, you may have to splice some wires, no big deal. It seems there are a bewildering number of different trailer connection plugs, from simple flat 4- wire plugs to 7-blade plugs as big as an apple. We have adapters to let you plug almost any trailer into any truck that’s wired for a trailer.

Bargman lighting and vehicle electrical connection products provide complete solutions for the recreational vehicle industry. Founded in 1931 to provide electrical connection products for the U.S. military, the Bargman brand has since been in lock step with the light duty trailer and recreational vehicle markets providing innovative designs and quality products for decades. Bargman is a recognized brand and an invaluable partner to the commercial truck and light-duty trailer manufacturers and their respective aftermarkets throughout North America.

Part Number:

Vehicle Fitment

This part is universal
Year Make Model Fitment Notes:
ALL       ALL        ALL         This part is universal

    Product Reviews


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    Bargman® - 4-Flat to 5-Flat Adapter
    Bargman® 51-20036 - 4-Flat to 5-Flat Adapter
    Average Rating: 5 of 5
    5 of 5
    Adapter Success
    I picked this out in fear and trembling, but it worked great. No more fears!
    SPosted by (Sugar Grove, WV) /
    Was this review helpful for you? Yes
    5 of 5
    Easy to handle and install. Good product.
    CPosted by (Waddington, NY) /
    Was this review helpful for you? Yes1  person found this review helpful.
    Bargman® - 4-Flat to 5-Flat AdapterBargman® 51-20036 - 4-Flat to 5-Flat Adapter    $9.34
    52 reviews
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