Semi-Truck Safety, Air & Electrical Universal
Semi-Truck Safety, Air & Electrical parts from 4 State Trucks can help keep your truck on the road. From air compressors and valves to fuses and lights, find the parts you need for air system maintenance and electrical repairs. Explore our selection to help maintain your truck's performance.
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Die-Cast Metal 7-Way Vehicle-Side RV Blade Connector Socket For Tail, Brake, Reverse, Turn Signals, Aux. Power
CURT MANUFACTURING
$13.197-Way Vehicle-Side RV Blade Connector Socket * High Quality RV Blade Connector Socket* Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 7-Way Connects Tail, Brake, Reverse, Turn Signals, Brakes And Auxiliary Power *...$13.19 -
Gloss Black 7-Way RV Blade Connector Mounting Bracket - Packaged
CURT MANUFACTURING
$5.297-Way RV Blade Connector Mounting Bracket * High Quality Connector Mounting Bracket* Made Of Steel* Color: Black* Securely Mounts 7-Way RV Blade Connector Socket Number 09-055000021 (Not Included)* Allows For Attachment To The Vehicle Or Trailer Hitch *...$5.29 -
Molded Rubber 4-Way Flat Connector Dust Cover Set
CURT MANUFACTURING
$5.394-Way Flat Connector Dust Cover Set * High Quality Connector Dust Cover Set * Made Of Rubber* Protects Connectors From Water, Dust And Road Grime When Not In Use * Helps Prevent Internal Corrosion For A Long Operating Life * Fits Virtually Any 4-Way Flat...$5.39 -
7-Way RV Blade Connector Tester For Tail, Brake, Reverse, Turn Signal, Auxiliary Power
CURT MANUFACTURING
$16.69Curt 7-Way to RV Socket LED Circuit Tester - Vehicle EndMake sure your vehicle's trailer wiring is in good working order with this connector tester! It checks taillights, brake lights, reverse lights, turn signals, electric trailer brakes, and auxiliary...$16.69 -
Molded Rubber 4-Way Vehicle-Side Flat Connector Dust Cover
CURT MANUFACTURING
$0.99Molded Rubber Dust Cover For 4-Way Vehicle-Side Flat Connector * High Quality Connector Dust Cover* Made Of Rubber* Protects Connector From Water, Dust And Road Grime When Not In Use * Helps Prevent Internal Corrosion For A Long Operating Life * Fits...$0.99 -
7-Way Vehicle-Side RV Blade Connector Socket Connects Tail, Brake, Reverse, Turn Signals, Auxiliary Power
CURT MANUFACTURING
$10.09Black Plastic 7-Way Vehicle-Side RV Blade Connector Socket W/ Concealed Terminals * High Quality RV Blade Connector Socket* Made Of Plastic* Color: Black* Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 7-Way Connects Tail,...$10.09 -
Replacement 4-Way Flat Socket Plugs For USCAR Connection
CURT MANUFACTURING
$48.99Plug-And-Play 4-Way Flat Socket Plugs Into USCAR Connection * High Quality Socket Plugs* Plugs Into USCAR Connection To Add 4-Way Flat And Retain Use Of Existing Socket * Simple Plug-And-Play Design Eliminates The Need For Cutting Or Splicing * 4-Way...$48.99 -
4-Way Flat Connector Tester W/ LED Lights
CURT MANUFACTURING
$5.694-Way Flat Connector Tester * High Quality Connector Tester* Made Of Plastic* Confirms Proper Function Of Vehicle-Side Wiring Connector * Tests 4-Way Flat Connection For Tail Lights, Brake Lights And Turn Signals * Constructed With LED Lights For...$5.69 -
Gloss Black Steel 7-Way RV Blade Connector Mounting Bracket
CURT MANUFACTURING
$2.697-Way RV Blade Connector Mounting Bracket * High Quality Connector Mounting Bracket* Made Of Steel* Color: Black* Securely Mounts 7-Way RV Blade Connector Sockets * Allows For Attachment To The Vehicle Or Trailer Hitch * Multiple Screw Holes Offer...$2.69 -
4-Way Flat Connector Plug, Socket W/ 12 Inch Wires
CURT MANUFACTURING
$10.59Flat 4 Way Connector Plug & Socket * High Quality COnnector Plug And Socket * Splices Into Existing Wiring To Provide COnnectiOns For Both Vehicle And Trailer * 4-Way Flat Output COnnects Tail Lights, Brake Lights And Turn Signals * COnstructed With...$10.59 -
5-Way Flat Connector Plug, Socket W/ 72 Inch Wires
CURT MANUFACTURING
$18.3972 Inch 5-Way Flat Vehicle End and Trailer End Connector Plug and Socket * High Quality Connector Plug And Socket* Splices Into Existing Wiring To Provide Connections For Both Vehicle And Trailer * Looped Wire Can Also Be Used As A Wire Extension For An...$18.39 -
6-Way Vehicle-Side Round Connector Socket Connects Tail, Brake, Turn Signals
CURT MANUFACTURING
$15.89Vehicle-Side 6-Pin Round Trailer Wiring Harness SocketGet ready for reliable trailer connections every time with the CURT 6-way round connector. This tough, die-cast metal connector is built to power up your trailer's tail lights, turn signals, electric...$15.89