Free shipping on orders over $35
800-218-0609 / support@sharptruck.com

You have no items in your shopping cart.

Curt Round To Flat Adapter Wiring Connector

$4.99 - $65.18
  • 5.0 1
  • Ask a question

Product Options

Curt 7-Way Round RV To 4-Way Flat Adapter - 5' Coiled Cable - UV Resistant
$42.10
$31.95
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57281
  • Adapts 7-way RV blade vehicle socket to fit 5-way flat trailer plugs
  • UV-resistant coiled cable extends up to 5' without scraping the ground
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 5-way flat connects tail lights, brake lights, turn signals and reverse lights
  • Durable molded plastic housing resists corrosion
UPC: 612314572816
Curt 7-Way LED Trailer Light Adapter - Adapts To 4-Way Flat Or 5-Way Flat Trailer Connector
$21.38
$16.22
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57004
  • Adapts a 7-way RV blade vehicle socket to fit 4-way or 5-way flat trailer plugs
  • Enables vehicles with a 7-way RV blade socket to recognize LED trailer lights
  • Built-in, integrated resistors for computers that don't recognize LED lights
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 5-way flat adds connection for reverse lights
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • Adapts To 4-Way Flat Or 5-Way Flat Trailer Connector
UPC: 612314570041
Curt 7-Way LED Trailer Light Adapter - Adapts To 6-Way Round Trailer Connector
$22.48
$17.06
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57005
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Enables vehicles with a 7-way RV blade socket to recognize LED trailer lights
  • Built-in, integrated resistors for computers that don't recognize LED lights
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • Adapts To 6-Way Round Trailer Connector
UPC: 612314570058
Curt 7-Way Round To 4-Way Flat Adapter - Package
$9.49
$7.20
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57041
  • Adapts a 7-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
UPC: 612314117048
Curt 4-Way Flat To 6-Way Round Wiring Adapter - Die Cast
$21.67
$16.45
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57183
  • 4-Way Flat To 6-Way Round Wiring Adapter
  • Adapts a 4-way flat vehicle socket to fit 6-way round trailer plugs
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Constructed from durable die-cast metal
  • Spring-loaded dust cover keeps connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Some manual wiring required
  • Die-Cast
UPC: 612314608034
Curt 4-Way Flat To 7-Way Round RV Blade Wiring Adapter - Plastic - Car End
$20.21
$15.33
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57184
  • Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Some manual wiring required
  • Plastic
  • Car End
UPC: 612314608041
Curt 4-Way Flat To 7-Way Round RV Blade Wiring Adapter - Die-Cast - With Bracket
$24.25
$18.40
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57185
  • Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Constructed from high-strength steel
  • Spring-loaded dust cover keeps connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Steel bracket securely mounts wiring to the vehicle or trailer hitch
  • Some manual wiring required
  • Die-Cast
  • Car End
UPC: 612314608058
Curt 4-Way Round To 4-Way Flat Wiring Adapter - Fits Light Duty Sockets
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57225
  • Adapts a 4-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Slit loom keeps wires contained and well protected
  • Fits Light Duty Sockets
  • Package
UPC: 612314114245
Curt 7-Way Round RV To 4-Way Flat Adapter - Curt 7-Way Round RV To 4-Way Flat Adapter - Pkg
$8.71
$6.61
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57241
  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-Way Round RV To 4-Way Flat Adapter
  • Pkg
UPC: 612314972494
Curt 7-Way Round RV To 4-Way Flat Adapter
$10.67
$8.10
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57245
  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • LED tester confirms proper function of vehicle-side wiring connector
  • Dust cover keeps connector clean when not in use
UPC: 612314572458
Curt 7-Way Round RV To 5-Way Flat Adapter - Curt 7-Way Round RV To 5-Way Flat Adapter - Pkg
$11.76
$8.92
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57251
  • Adapts a 7-way RV blade vehicle socket to fit 5-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 5-way flat connects tail lights, brake lights, turn signals and reverse lights
  • 7-Way Round RV To 5-Way Flat Adapter
  • Pkg
UPC: 612314017263
Curt 7-Way Round RV To 6-Way Round Adapter - Center Pin Auxiliary
$18.08
$13.72
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57255
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • LED tester confirms proper function of vehicle-side wiring connector
  • Dust cover keeps connector clean when not in use
  • Center pin designated for auxiliary power
  • Center Pin Auxiliary
UPC: 612314572557
Curt 7-Way Round RV To 6-Way Round Adapter - Center Pin Auxiliary Power
$10.91
$8.28
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57261
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Center pin designated for auxiliary power
  • Center Pin Auxiliary Power
UPC: 612314972692
Curt 7-Way Round RV To 6-Way Round Adapter - Center Pin Brake
$18.08
$13.72
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57265
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • LED tester confirms proper function of vehicle-side wiring connector
  • Dust cover keeps connector clean when not in use
  • Center pin designated for brake lights
  • Center Pin Brake
UPC: 612314572656
Curt 4-Way Flate License Plate Light Plug Adapter
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57404
  • Allows a 4-way flat socket to be mounted in a license plate light hole
  • 1-1/4" plug fits a typical license plate light hole
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover keeps connector clean when not in use
  • 1.25 in. Round Plug
  • Package
UPC: 612314004041
Curt 4-Flat License Plate Light Plug Connector Socket - w/36" Lead And Dust Cover
$8.30
$6.30
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57405
  • Splices into vehicle wiring to provide a connection for a trailer plug
  • 1-1/4" plug fits a typical license plate light hole
  • Designed for use on vehicles with two-wire systems
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Constructed with bonded wires and durable molded rubber
  • Features 36" of color-coded wire for easier installation
  • Dust cover keeps connector clean when not in use
  • 1.25 in. Round Plug
  • w/36 in. Lead And Dust Cover
UPC: 612314114054
Curt 4-Way Round To 4-Way Flat Wiring Adapter - Die Cast
$7.85
$5.96
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57444
  • Adapts a 4-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Constructed from durable die-cast metal
  • Slit loom keeps wires contained and well protected
  • Die Cast
UPC: 612314094448
Curt Duplex Electrical Adapters - Plastic - Curt 4-Way Flat To 6-Way Round And Curt 4-Way Flat - Includes Hardware/Bracket
$27.59
$20.94
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57604
  • Adapts a 4-way flat socket to fit 4-way flat and 6-way round trailer plugs
  • Simple plug-and-play design for easy installation (some manual wiring required)
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 6-way round connector adds electric brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
  • Plastic
  • 4-Way Flat To 6-Way Round And 4-Way Flat
  • Incl. Hardware/Bracket
UPC: 612314046041
Curt 6-Way Round To 4-Way Flat Wiring Adapter
$7.77
$5.90
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57621
  • 6-Way Round To 4-Way Flat Wiring Adapter
  • Adapts a 6-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
UPC: 612314962495
Curt Duplex Electrical Adapters - Plastic - Curt 4-Way Flat To 6-Way Round And Curt 4-Way Flat - w/Test Lamps - Includes Hardware/Bracket
$32.49
$24.65
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57624
  • Duplex Electrical Adapters
  • Plastic
  • Adapts a 4-way flat socket to fit 4-way flat and 6-way round trailer plugs
  • Simple plug-and-play design for easy installation (some manual wiring required)
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 6-way round connector adds electric brakes and auxiliary power
  • Integrated LED tester confirms proper function of vehicle-side wiring connector
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
  • w/Test Lamps
  • Incl. Hardware/Bracket
UPC: 612314046249
Curt 6-Way Round To 4-Way Flat Wiring Adapter with Tester
$10.34
$7.84
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57627
  • Adapts a 6-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • LED tester confirms proper function of vehicle-side wiring connector
  • Dust cover keeps connector clean when not in use
UPC: 612314576272
Curt 7-Way Round RV To 6-Way Round Adapter - Center Pin Brake
$11.11
$8.43
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57661
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Center pin designated for brake lights
  • Center Pin Brake
UPC: 612314007660
Curt 6-Way Plug To 7-Way Socket Wiring Adapter - Die-Cast/Plastic
$29.22
$22.17
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57667
  • Adapts a 6-way round vehicle socket to fit 7-way RV blade trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Die-Cast/Plastic
UPC: 612314016075
Curt Duplex Electrical Adapters - Plastic - Curt 4-Way Flat To 7-Way Round RV Blade And Curt 4-Way Flat - Includes Hardware/Bracket
$35.29
$26.78
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57672
  • Duplex Electrical Adapters
  • Plastic
  • Adapts a 4-way flat socket to fit 4-way flat and 7-way RV blade trailer plugs
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
  • Some manual wiring required
  • Incl. Hardware/Bracket
UPC: 612314047048
Curt Duplex Electrical Adapters - Plastic - Curt 4-Way Flat To 7-Way Round RV Blade And Curt 4-Way Flat - w/Test Lamps - Includes Hardware/Bracket
$39.89
$30.27
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57674
  • Duplex Electrical Adapters
  • Plastic
  • Adapts a 4-way flat socket to fit 4-way flat and 7-way RV blade trailer plugs
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Integrated LED tester confirms proper function of vehicle-side wiring connector
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
  • Some manual wiring required
  • w/Test Lamps
  • Incl. Hardware/Bracket
UPC: 612314047246
Curt 7-Way Round RV To 6-Way Round Adapter - With Back-Up Alarm - Center Pin Brake
$22.90
$17.38
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57720
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Integrated backup alarm sounds when vehicle is in reverse
  • Spring-loaded dust cover keeps connector clean when not in use
  • Center pin designated for brake lights
  • With Back-Up Alarm
  • Center Pin Brake
UPC: 612314107728
Curt 7-Way Round RV To 4-Way Flat Adapter - With Back-Up Alarm
$18.37
$13.94
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57724
  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs/li>
  • Simple plug-and-play design eliminates the need for cutting or splicing/li>
  • 4-way flat output connects tail lights, brake lights and turn signals/li>
  • Integrated backup alarm sounds when vehicle is in reverse/li>
  • Dust cover keeps connector clean when not in use
  • With Back-Up Alarm
UPC: 612314107704
Curt 7-Way Round RV To 5-Way Flat Adapter - With Back-Up Alarm
$18.74
$14.22
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57725
  • Adapts a 7-way RV blade vehicle socket to fit 5-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 5-way flat connects tail lights, brake lights, turn signals and reverse lights
  • Integrated backup alarm sounds when vehicle is in reverse
  • Dust cover keeps connector clean when not in use
  • With Back-Up Alarm
UPC: 612314107711
Curt 7-Way Round RV To 6-Way Round Adapter - With Back-Up Alarm - Center Pin Auxiliary
$22.90
$17.38
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57726
  • Adapts a 7-way RV blade vehicle socket to fit 6-way round trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 6-way connects tail, brake, turn signals, electric brakes and auxiliary power
  • Integrated backup alarm sounds when vehicle is in reverse
  • Spring-loaded dust cover keeps connector clean when not in use
  • Center pin designated for auxiliary power
  • With Back-Up Alarm
  • Center Pin Auxiliary
UPC: 612314107735
Curt 2-Way Flat To Cigarette Lighter Power Adapter
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 58313
  • 2-Way Flat To Cigarette Lighter Power Adapter
  • Powers accessories with the vehicle's 2-, 4- or 5-way flat connector
  • Provides a cigarette lighter type socket
UPC: 612314003112
Curt 4-Flat Car To 4-Flat Trailer - 1.25" Round Plug
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 58404
  • 4-Flat Car To 4-Flat Trailer
  • 1.25 in. Round Plug
UPC: 612314114047
Curt 4-Flat Car To 4-Flat Trailer - 1.25" Round Plug - w/36" Lead And Dust Cover
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 58405
  • 4-Flat Car To 4-Flat Trailer
  • 1.25 in. Round Plug
  • w/36 in. Lead And Dust Cover
UPC: 612314014057
Curt 4-Flat License Plate Light Plug Connector Socket - w/60" Lead And Dust Cover
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 58406
  • Splices into vehicle wiring to provide a connection for a trailer plug
  • 1-1/4" plug fits a typical license plate light hole
  • Designed for use on vehicles with two-wire systems
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Constructed with bonded wires and durable molded rubber
  • Features 60" of color-coded wire for easier installation
  • Dust cover keeps connector clean when not in use
  • 1.25 in. Round Plug
  • w/60 in. Lead And Dust Cover
UPC: 612314014064
Curt 4-Way Round To 4-Way Flat Wiring Adapter - Plastic
$6.57
$4.99
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 58414
  • Adapts a 4-way round vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Plastic
UPC: 612314094141
Curt 4-Way Flat To 7-Way Round Brake Control Wiring Adapter
$85.90
$65.18
Free Shipping Over $35
Availability: SHIPS IN 3-7 DAYS
Part #: 57186
  • Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs
  • Simple plug-and-play design for easy installation (some manual wiring required)
  • Includes wiring and components to splice in a brake control connection
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Includes circuit breakers, a heavy-duty flasher and other necessary components for splicing
  • Die-Cast
  • Car End
  • Incl. Mounting Brackets
UPC: 612314571864
Works great
5
Works great
Was this review helpful?

Loading reviews...

No questions have been asked about this product yet. Have a question? Ask it below!

There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power. With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match. For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug.

Curt offers a quick and simple solution in the form of an electrical adapter  that allows a connection to be made between a mismatched trailer plug and vehicle socket. It easily plugs in your vehicle's electrical socket and usually requires no additional wiring. Curt offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more.

This electrical adapter is designed to adapt a 7-way round vehicle socket to fit a 4-way flat trailer plug. It is constructed from quality plastic and requires no splicing. All CurtT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence.

WARNING: Some products may contain chemicals such as DEHP, which can cause cancer, birth defects or other reproductive harm. For more info go to www.p65warnings.ca.gov
Length 4 inch(es)
Width 3 inch(es)
Height 2 inch(es)
Weight .22 lb(s)

Contact Us

Our experts are ready to help you.

Call

800-218-0609

Follow