Description
Engineering Without Compromise
Most trailer locks are designed for convenience, not security. They use thin metals and “universal” fits that leave massive gaps for crowbars and power tools. Code 4 locks are built on a different philosophy. We utilize reinforced, heavy-gauge steel and precision-engineered tolerances to ensure a snug, tamper-proof fit for your specific coupler.
Why Choose Code 4?
Industrial-Grade Steel
We’ve armored the Code 4 line to withstand aggressive physical attacks, including drilling, grinding, and sledgehammering. CRS Steel, 1/4” thk.
The “Zero-Gap” Fit
By matching our locks to specific coupler models, we eliminate the leverage points that thieves rely on. If they can’t get a tool in, they can’t get your trailer out.
Weather-Hardened Finish
Every Code 4 lock features a high-performance powder coat, tested to endure the harshest road salts and coastal environments without seizing or corroding.
Professional Security for Every Hauler
Whether you’re protecting a fleet of flatbeds or your family’s weekend camper, Code 4 provides the same level of security used by law enforcement and heavy-haul professionals.
Our Commitment to the Community
As a company built by haulers, for haulers, we know that your trailer is more than just metal—it’s your investment. We focus our resources on the quality of the steel and the precision of the weld, rather than flashy packaging or corporate overhead.
Don’t let your trailer be the easy target. Upgrade to Code 4 and rest easy knowing your property stays exactly where you left it.
Return Policy
At Code 4, we build professional-grade security for owners who take their equipment seriously. Because our locks are precision-engineered, we maintain a strict return policy to ensure every customer receives a factory-fresh uncompromised product. A return authorization must be requested via email. Customer will be responsible for any and all shipping fees and may be subject to a 10% restocking fee.
Eligibility for Returns
Returns are accepted only under the following conditions:
Condition: Item must be unopened, unused, and in its original, sealed retail packaging.
Timeframe: Return requests must be initiated within 30 days of the delivery date.
How to Initiate a Return
Please contact us at contactus@code4trailerlocks.com to request a Return Authorization.
Shipping Policy
We ship to the lower 48 states via UPS or FedEx. Our team makes every effort to process and ship orders within 24 hours of receipt.
Please note that orders placed over the weekend or on holidays may experience a slight delay. In the event an item is on backorder, we will contact you immediately via email.
If you have any questions regarding your shipment, please reach out to us at contactus@code4trailerlocks.com.


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