Code 4 2-5/16″ Trailer Coupler Lock – Heavy-Duty Anti-Theft Protection

Product Overview

Secure your trailer with confidence using the Code 4 2-5/16″ Trailer Coupler Lock. Designed specifically for larger couplers commonly found on equipment trailers, car haulers, dump trailers, enclosed trailers, and heavy-duty utility trailers, this lock provides a tight, secure fit that helps deter theft and unauthorized towing. Fits Straight-Tongue & A-Frame Receivers.

Manufactured from heavy-duty steel and protected with a durable powder-coated finish, the Code 4 Lock is built to withstand harsh weather conditions while delivering dependable security wherever your trailer is stored.

Whether you’re protecting valuable equipment, vehicles, or commercial assets, the Code 4 Lock helps provide peace of mind when your trailer is unattended.

Key Features

Precision “Zero-Gap” Design

Engineered to closely fit compatible 2-5/16″ couplers, reducing leverage points commonly used during theft attempts.

Heavy-Duty Steel Construction

Built from thick steel components designed to resist cutting, prying, drilling, and impact damage.

Weather-Resistant Finish

Durable powder coating helps protect against corrosion, road salt, moisture, and year-round outdoor exposure.

High-Security Locking System

Includes a keyed locking mechanism for reliable protection and convenient operation.

Made in the USA

Proudly manufactured in Tennessee using premium materials and quality workmanship.

Ideal Applications

Perfect for securing:

• Car Haulers
• Equipment Trailers
• Dump Trailers
• Enclosed Cargo Trailers
• Flatbed Trailers
• Landscape Trailers
• Construction Trailers
• Commercial Trailer Fleets

Why Choose Code 4?

Many trailer thefts occur because standard coupler locks leave enough space for thieves to use pry bars or other tools. The Code 4 Lock is engineered to minimize these vulnerabilities with a close-fitting design and rugged steel construction.

From contractors and fleet operators to weekend racers and trailer owners, Code 4 provides professional-grade security for valuable trailers and cargo.

Specifications

What’s Included

• Code 4 2-5/16″ Trailer Coupler Lock
• Locking Mechanism
• Keys
• Installation Instructions