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  1. Custom Fit Vehicle Wiring
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  3. 7 Blade to 5 Flat
  4. Universal Fit
  5. Wiring Adapters
  6. Plug and Lead
Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord
etrailer Installation
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CURT

Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord

Part Number: C57281
In Stock
$51.66
Custom Fit Vehicle Wiring
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
This adapter lets you span 5' to connect your 7-way, RV-style, vehicle-end connector to the 5-way flat connector on your trailer. Coiled cord ensures that wires won't drag on the ground. Molded construction is durable and corrosion resistant. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C57281 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (44)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C57281

Highlights

  • Tow Lights and Signals: Adapter carries running lights, turn, and brake signals to trailer.
  • Reverse Lockout Ready: 5-way flat plug supports hydraulic surge brake lockout for boat trailers.
  • Flexible Reach: 60" cord gives extra length between tow vehicle and trailer for easy hookup.
  • Simple Plug Connection: 7-way RV blade plugs directly into vehicle socket for quick setup.
  • Water Use Friendly: Lets you disconnect trailer wiring before backing into the water.

Features to know about

Connects 7-Way RV to 5-Way Flat: Ready-to-Use Adapter

Switching between trailers with different connectors is easy with this adapter. It converts a 7-way RV style socket to a 5-way flat connector, so your lighting and reverse lockout signals work without rewiring. The plug-and-lead design keeps everything straightforward and functional right out of the box.

Built for Safe Trailer Lighting: Keeps Signals Working Correctly

When you hook up, the lights, turn signals, and reverse lockout for hydraulic surge brakes all operate as they should. It maintains full signal reliability between your tow vehicle and trailer, giving you what you need for safe towing every time you plug in.

Extended Reach with 60" Cord: Flexible Connection Where You Need It

The 60-inch cord adds room to move, so you don’t have to stretch or strain connectors between your vehicle and trailer. That extra length helps when working around hitches, spare tires, or accessories that might make shorter cords tough to manage.

Durable Plug-and-Lead Build: Simple and Secure Hookup

This wiring adapter is designed for quick connection and long-lasting use. The molded plugs resist wear and moisture, while the flexible cable allows easy handling and coiling when not in use. Just plug it in, secure it, and you’re ready to tow.

Specs

Electrical and Compatibility

  • Connector type: 7-Way RV Style to 5-Way Flat
  • Application: Adapts 7-way RV blade vehicle socket to 5-way flat trailer plug
  • Functionality: Provides lighting, turn signals, and reverse lockout for hydraulic surge brake systems
  • Electric brakes: Not supported

Dimensions

  • Cord length: 60"

57281 Curt Trailer Connector Adapter - 7 Way RV Style to 5 Way Flat - 5' Cord

Similar to Hopkins HM47025 and Wesbar 707250





Customer Satisfaction Score:

Ratings & Reviews

4.8

44 reviews
Review sort icon
This adapter lets you span 5' to connect your 7-way, RV-style, vehicle-end connector to the 5-way flat connector on your trailer. Coiled cord ensures that wires won't drag on the ground. Molded construction is durable and corrosion resistant.

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i like it,it seems to be good quality



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Perfect fit and everything worked corre ctly



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What I ordered!



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Quality product, great communication and follow up.



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Perfect replacement for my Ranger boat trailer with swing-away tongue. In my case this was a very easy installation/swap. I'll purchase again when necessary.



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Cliff profile picture

Cliff

5/7/2026

Perfect! I have sent this link to people on forums so that they can purchase it as well.

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

5/7/2026

@Cliff It's pretty awesome to hear that you're out there helping people find what they need by sharing the link. Thanks for being so awesome, Cliff!


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Works great



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Great quick service. Thanks



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Very good, specially the quality is sup erior.



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Great product, fixed my lighting issues!



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Very easy installation!! Looks great! The perfect replacement.



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Product arrived in excellent time and was a perfect fit for my trailer. Better cord than what was on my boat trailer.



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Customer service was very helpful, got to talk to a real person right away. Products were just what I wanted and work perfectly for my new boat.



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This was the perfect product for my truck to boat trailer electrical connection.



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Just what I was looking for. Thanks for helping me out.



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Andy was very knowledgeable of his products and he was extremely helpful.



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Wiring on boat trailer went bad so L replaced it.



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Excellent quality



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No issues with this product. Performs as it should



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Part was awesome



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Hey the connector did not work properly. When plugged in seems to make lights short out. Not anything with truck or trailer because the original wire is have continues to work fine. Just ordered a new one because the one I have had wear on it . Thanks.


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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Replacement for Fulton Jack on 2016 Boatmate Trailer
    Hi David; for a replacement jack I recommend the Trailer Valet JXS Drill Powered Swivel Trailer Jack w/ Footplate # TV64FR. This jack has a 5,000 lb capacity so it will be a lot easier to operate compared tot the Fulton one you have now. You also have the option to use a drill to raise and lower it (changes lift capacity to 1,250 lbs). I'm guessing you want a wheel so you will also need the # TV89FR. As far as the wiring I'm not sure what you currently have on the trailer. If you have...
    view full answer...
  • Looking for Coiled 7-Way to 4-Way Adapter
    Hey Garrett, while Reese isn't around anymore the Curt adapter part # C57281 is a really great choice for a coiled 7-way to 4-way adapter like what you are looking for. Are you flat towing a vehicle?
    view full answer...
  • Compatibility of Boat Trailer with Electric Brakes With 7-Way Extension Adapter
    The Curt Trailer Connector Adapter - 7-Way RV Style to 5-Way Flat - 60" Cord # C57281 will give you the lights, turn signals, and reverse lockout that could be used for a hydraulic surge brake lockout. It does not give you the electric brake function. It sounds like you only have a 4-way but want a 5-way for electric brakes, but it also sounds like you have a 7 way to convert. My recommendation is to change the trailer side wiring using the Trailer Wiring 7-Way Upgrade Kit w/ Junction...
    view full answer...
  • Recommended Wiring Adapter for a 7 Way to a 5 Pole Round Trailer Connector
    Hey Pharon, unfortunately there aren't any adapters that are going to allow you to use a 7 (what I'm assuming you have on your Jeep) to a 5 way round. What you can do instead is cut off the 5 way on your trailer and swap it with the Hopkins Endurance 5-Way Flat Trailer Connector # HM47910 which you can then use the Curt Trailer Connector Adapter # C57281.
    view full answer...
  • 4-Way to 7-Way Adapter Recommendation for 2022 Tesla Model Y
    Hey Pierre, it sounds like you are looking for a 4-way to 7-way trailer wiring adapter to fit your 2022 Tesla Model Y which we can help with but the Curt # C57281 is for flat towing scenarios and actually would put the wrong version of the connectors on the vehicle to match the trailer. So what you'd want instead is the part # 37185 which does convert the 4-way to the 7-way that would work with the trailer connector.
    view full answer...
  • Adapter For 7-Way on Vehicle to 5-Way on Trailer
    I have a solution for you to consider, but there are no adapters for a 5-way round. What you can do though is just cut off the 5-way round on your boat trailer and wire in a 5-flat, the 5-Way Flat Trailer Connector # HM47910. Then what you can use for a 7-way to 5-way adapter in the length you need is the 7-Way RV Style to 5-Way Flat - 60" Cord # C57281. I know this isn't 100% what you were asking for but I wanted to offer it as an option because there isn't a 5-round adapter.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Ronnie R
Written by:
Ronnie R

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