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Secure unattended trailers with a compact zinc alloy coupler lock designed for RV, utility and cargo trailers.
Durable Zinc Alloy Construction
Built for long-term outdoor use with excellent corrosion resistance.
Internal Expansion Security System
Expands inside the coupler cavity to prevent unauthorized coupling.
Fast Installation & Removal
Includes hex wrench for quick locking and unlocking.
Suitable for travel trailers and camper trailers.
Can be used on compatible boat trailer couplers.
Ideal for utility and equipment trailers.
Helps secure enclosed cargo trailers.
| Feature | Coupler Lock (50D) | Hitch Lock |
|---|---|---|
| Prevents Coupling | ✔ Yes | ❌ No |
| Prevents Trailer Towing | ✔ Yes | ❌ No |
| Best For | Parked Trailers | Towing Vehicles |
| Installation Location | Inside Coupler Socket | Trailer Hitch Receiver |
Determine your specific trailer type (RV, boat, utility, or heavy cargo fleet)
Check your coupler socket size carefully (standard 1-7/8", 2", or heavy-duty 2-5/16")
Select a high-security defense level with extreme weather and corrosion resistance.
Ensure the lock shape fits perfectly inside the coupler socket to prevent any leverage theft.
It is designed for most standard 2″ trailer couplers. Please verify the coupler cavity diameter before ordering.
Yes. The zinc alloy body provides excellent corrosion resistance for outdoor use.
Yes. Contact us with your key code for replacement key support.
This high-quality zinc alloy tow bar socket lock supports a complete, bespoke packaging solution
As a professional hardware supply chain integrator, RuiYu offers the 50D trailer coupler socket lock with flexible MOQ and factory-direct pricing
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✅ Custom Logo (Laser / Silk-screen)
✅ Custom Colors Available
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✅ Private Label for Distributors
✅ ISO9001 Certified Factory
✅ 20+ Years Die Casting Experience
✅ OEM & ODM Support
✅ Fast Production Lead Time
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✅ OEM & ODM Available
✅ Factory Direct Pricing
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