Trailer Plugs and Adapters

These socket and plug adapters will let you change from flat to round wiring and from 7-way to 4-way function. These adapters are from Custer Products. Please select which configuration you would like from the drop down above.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

7 Round Pin female plug for 7 wire trailer cord. Typically used on semi truck/trailer installations

Always have the right lighting connection for the trailer you are pulling or towing with your wrecker or car carrier. New from TowMate, the Adapta-Box offers four popular trailer wiring receptacles, so you can use the trailer’s factory marker lights and stop/tail/turn signals while moving through traffic.

Replacement for CR-5

Stainless steel spring

2, 1/4" mounting holes (82-1020)

Solid brass pin terminals for best conductivity

Die-cast housing for superior corrosion resistance

Technical Specifications:

Pack Quantity: 1

Material: Zinc die-cast

Product Type: Connector

Style: Heavy-Duty

Plug / Socket #: 4 Pole

Voltage: 12-24V

7 Pin male plug-in for 7 wire trailer cord.

This internal replacement polarized socket works with your 6139 Jump-Start Set.

Allows one person to test both male and female 7-round pin tractor-trailer plugs and more. In addition, the tester allows you to jump current to a dead circuit during emergencies so you can still drive your rig. Includes an extra jumper connector. It allows the jumping of current to a dead circuit for emergency situations so you can still drive the rig.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

The Motec female 9-pole round socket has a universal application.

Accept no limits in this high-performance, layerable look.

The Motec male 9-pole round socket has a universal application.

Ez Connectors R7-05 serves as the vehicle end of the original EZR7 product line and also functions as a dummy plug. It is designed for hard wire installation on the bumper of the vehicle. The unit includes 2 feet of cord on the vehicle, a mounting bracket, a dummy plug, butt connectors, sealant-type heat shrink tubing for a waterproof splice, and a tie wrap for securing it to the vehicle. When connecting, you remove the dummy plug from the vehicle socket and place it in the trailer plug holder.

The EZ Connector R7-07 is the trailer end of the EZR7 product line. It includes 4 feet of cable, a plug holder, butt connectors, sealant type heat shrink tubing for a watertight splice, and a heavy-duty tie wrap to secure the cable to the tongue.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

Dual accessory sockets useful for powering a large range of equipment and accessories. Use for work and recreation.

Test the towing circuits at the back of your truck with speed and ease. Tester is suited for older light and medium duty trucks and campers. The tester features LED lights that turn on to indicate when each circuit is working.

The Only Set of Tools to Clean Every North American Trailer Connector. The Truck and Trailer Pin Master Cleaner Set is designed for use on 4/5, 6-way round, 7-way flat (spade) and 7-way round truck and trailer electrical terminals. The unique, patented design allows for precise removal of corrosion from both male and female pins, while maintaining proper pin dimensions and is also great for cleaning butt and bullet type connectors found on most tail and side marker assemblies. Packaged in a leather-style holster with magnetic clasp, it includes custom-sized swabs for removing debris and applying the supplied contact enhancer solution.

Today it’s all about projects you can do yourself, and the Relay w/ Prewired 5-Pin Socket lets you do just that! Hooking up your lights couldn’t be easier with this socket. Capable of handling 40 amps, this socket can easily work in your projects. Plus, you can save yourself a little bit of time as it comes pre-wired!

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

Heavy-Duty Nickel-Plated Zinc Die Cast Housing, ISO Plug with Spring Guard.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

Want to add USB charging capabilities to any dash panel or surface? This unit will do just that for you and light it up with a blue LED.

The 3-Way Trailer Adapter allows 7-way flat (spade) pin type terminal connections to 6-way round and 4/5 pin trailer connections.

Compatible with all manufacturers, the Pigtail Plug Safety Shims from Ken-Tool hold the plug in the receptacle to keep on the tail lights. On top of that, they create a tighter fit for the plug in the socket.

CURT electrical connector brackets provide a simple solution for mounting wiring to your trailer hitch or the rear of your vehicle. Connector wires can be a nuisance when they are just lying around. They can get tangled up with cargo and even damaged. An electrical connector left to hang off the back end of your vehicle is an even greater hazard. Secure, protect and optimize the use of your electrical connector by mounting it with a CURT connector bracket. This trailer wire connector bracket is designed to hold a 7-way RV blade socket. It features sturdy steel construction with a black finish and can be mounted on your vehicle or trailer hitch. When it comes to plugging in your trailer lights, it pays not to skimp out. CURT electrical is the smart way to ensure that your trailer lights and electrical systems are prepared for the road ahead. Keep the power flowing, no matter where your adventures take you, with quality electrical products from CURT.

This is the perfect solution to add USB and AUX inputs into any area of your boat. This Rocker switch style product allows you to plug into any rocker switch slot, but run a through put of your USB and AUX without hanging wires out of your dash. This allows you to plug devices right into the rocker to accomplish that, while keeping a neat and clean look to your boat.

Sockets and Plugs made with heavy-duty, zinc die-cast for maximum strength and durability.

Trailer charging cord is permanently attached to your semi tractor and then plugs in to your trailer to run a 12 volt hydraulic power unit or charge an auxilary battery.

Used to provide power to heavy draw auxiliary trailer equipment

Heavy-duty zinc die cast housings

Power and ground terminals hold up to 1/0 gauge wire

Compact socket design with exposed terminals for easy installation in modern trailers. Extended interior plug prevents damage to shell. Integral finger grips for positive pull.

Tough GE Noryl, non-conductive, corrosion resistant body. Floating type, cadmium-plated brass pins allow best alignment and long-lasting contact with plug|Internal connections feature a direct wired ground. Circuits are identified by color codes and embossed notations. Ring terminals are used to connect wires|Receptacle pins prevent increased resistance due to strand breakage caused by set screws.

Tough GE Noryl, non-conductive, corrosion resistant body. Floating type, cadmium-plated brass pins allow best alignment and long-lasting contact with plug|Internal connections feature a direct wired ground. Circuits are identified by color codes and embossed notations. Ring terminals are used to connect wires|Receptacle pins prevent increased resistance due to strand breakage caused by set screws.

Tough GE Noryl, non-conductive, corrosion resistant body. Floating type, cadmium-plated brass pins allow best alignment and long-lasting contact with plug|Internal connections feature a direct wired ground. Circuits are identified by color codes and embossed notations. Ring terminals are used to connect wires|Receptacle pins prevent increased resistance due to strand breakage caused by set screws.

One person can trace each lighting function on a trailer to the individual terminal it is connected to.

Want to add USB to any dash panel or surface? This unit will do just that for you and illuminates with four blue leds inside.

Test the towing circuits at the back of your truck with speed and ease. Tester is suited for older light and medium duty trucks and campers. The tester features LED lights that turn on to indicate when each circuit is working.

This is the perfect solution to add USB and AUX inputs into any area of your boat. This Rocker switch style product allows you to plug into any rocker switch slot, but run a through put of your USB and AUX without hanging wires out of your dash. This allows you to plug devices right into the rocker to accomplish that, while keeping a neat and clean look to your boat.

The Marine Sport rocker style switch allows you to run through USB clean and neat in your boat. Using the blue led illumination, you can easily see this plug in at night.

The Marine Sport rocker style switch allows you to run through USB clean and neat in your boat. Using the blue led illumination, you can easily see this plug in at night.

2 mounting holes - 0.26” by 0.37”

Mount holes 2.83” center to center of screw holes

Stainless steel spring

2, 1/4" mounting holes (82-1020)

Solid brass pin terminals for best conductivity

Die-cast housing for superior corrosion resistance

Technical Specifications

Pack Quantity: 1

Standards: SAE J560

Material: Zinc die-cast

Product Type: Connector

Style: Heavy-Duty

Terminals: split pin, enclosed

Plug / Socket #: 4 Pole

Voltage: 12-24V

Amperage: 35A

Going camping for the weekend? Make sure your truck s lighting system is up to the challenge with this replacement 7-wire female RV plug. This screw-type socket is primarily used in RV applications and includes seven flat blades. The plug is constructed of molded PVC for impact resistance.

This is a Miller Industries 4-Way Socket. All sockets and plugs have contacts that float for proper connection with mating receptacles. The terminals will accept up to 12 gauge wire. A cable clamp will hold just about all cable sizes firmly.

This is a replacement 9-Way Plug from Zacklift. The plug has a female end, and is a no-wire variant.

This is a Zacklift 9-way plug. It has a female end, and measures 18" wire lead.