Best Plastic Plug Connectors in 2026

Trailer 4 Pin Extension. 4 pin flat trailer wire extension with a male and female end, great for extending your trailer lights wire hookup to your vehicle, widely used for all types of trailers with 4 way flat plug like boat trailer, utility trailer and horse trailer

Stable Connection. This 4 pin trailer wiring extension is 8ft long; Flat 4 wire trailer extension supplys power for trailer taillights, brake lights and turn signals lights

Well Protected. Both of the 4 way male and female trailer connectors are equips with rubber dust cover, protects the terminals from water and dust when not in use. The whole extension is wrapped by a nylon net tube to make the wires wear-resistant

2 in 1 Design. This trailer light tester combines both 4 way circuit tester and 7 way trailer light tester, allows you to test both the 4 pin and the 7 blade connectors. Easy and quick to test trailer circuits on most trucks. ( Notes: 📢The trailer tester will upside down when testing for 2017 Newer Ford/GMC/Chevy model 📢7 pin trailer plug tester is unable to test LED lighting system 📢Doesn't work with vehicle has a lamp-out sensor, such as BMW, VW, Audi, Mercedes-Benz, Porsche etc.)

6 Light Functions. Versatile trailer wiring tester can be used to test 6 separate trailer light functions, quickly confirm the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes and 12V auxiliary power on your vehicle

Bright LED Indicators. Plug in 4 way and 7 way trailer light tester equips a LED light for each electrical function. Plugging the light tester and check, you can easily read the green LEDs and find out which wiring has a problem

7 Way Trailer Plug. Universal 7 pin vehicle side and trailer side wiring plug come ready to splice into your existing trailer wiring. They can be used to connect the taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power

Durable and Light Construction. For long-lasting use and a reliable connection, the housing of the rv 7 blade plug is made from heavy black plastic to prevent it from rusting and corrosion; Brass terminals makes better conductivity!

7 Blade Trailer Connector. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this 7 pin electrical plug. 7 way female trailer plug features 2 handle hooks on either side of the plug for a better grip when plugging in or unplugging trailer wiring

Waterproof Sealed. Different from normal 7way plug, Oyviny upgraded 7 pole trailer plug equips with detachable compression nut and rubber grommet on the end to keep out moisture, protects the terminals from water and dust. Size of the wire inlet is 3/4'' NPT

Sturdy 7 Way Trailer Plug. This male-end 7 pin trailer adapter plug provides a secure connection between your trailer and tow vehicle, 7 pin plug comes ready to splice into your existing trailer wiring to connect taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power

Good Strain Relief. All the terminals inside the trailer 7 way plug are tightly keep in place by screw strain relief clamp, which keeps trailer wires from pulling out of the connector, offer reliable connection

Neat Wiring Harness. 7-way copper wire molded into a heavy duty plug, provides a fast and simplified way for wires connection, keeps all your wires in order, perfect for RVs, trailers, campers, caravans, food vans and other towed vehicles

Excellent Construction. 7 Pin trailer cord use premium double prongs to replace poor single prong, adopt solid copper cord, stronger and rugged, brass terminal ensure a solid connection every time and makes better conductivity

Durability. 4 feet trailer extension cable are coated with thick yet flexible insulation, offering kink-free flexibility and withstanding all weather conditions. Soft and durable PVC sheathing is waterproof and corrosion resistant for reliable and long service life

4 Way Flat Trailer Extension. 4 flat trailer extension cable with a male and female end, great for extending your trailer lights wire hookup to your vehicle, widely used for all types of trailers with 4 way flat plug like boat trailer, utility trailer and horse trailer

Well Protected. Both of the 4 way male and female trailer connectors are equips with rubber dust cover, protects the terminals from water and dust when not in use. The whole extension is wrapped by a nylon net tube to make the wires wear-resistant

Plug and Play. Flat 4 trailer extension comes with plug&play design, simply plug the connectors into the existing wiring to provide connections for both vehicle and trailer, No cutting or splicing need

Detachable Design. 7 pin trailer pigtail adopts a detachable design with good sealing performance, simply insert the provided male terminals into the female terminal on the pigtail for connection. Different from other 7 pin trailer wiring, Plug&Play detachable design allow you to easily disassemble or connect the wire at any time.

Convenient Replacement. 7 way trailer wire features detachable design of wire and plug, unique design allows you to replace the plug or wire only when one is broken, without having to replace both, more cost-effective and convenient.

Reliable Connection. 7 pin color-coded trailer cable can be used to connect trailer taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power; 12V power pigtail on the harness can be used to power your backup camera.