5 Best King Pin for 5th Wheel

Protecting your fifth wheel trailer starts with a reliable king pin lock or replacement pin. Whether you’re parking at a campsite or storing your RV, the right king pin can prevent theft and ensure a secure hitch connection.

This guide reviews five top options, from heavy-duty anti-theft locks to weldable replacement pins. Each product is chosen for its build quality, ease of use, and specific features to help you make an informed choice.

BOYISEN 5th Wheel King Pin Lock – Convenient Handle Design

The BOYISEN king pin lock stands out with its unique handle and outward-facing cylinder, making locking and unlocking more convenient than traditional downward designs. You’ll appreciate the solid steel construction that resists weather and breakage, plus the blossom lock mechanism adds an extra layer of security. It comes with three keys, and each lock has a unique key code printed on the key for easy replacement if lost.

This lock is ideal for RVs, semi trailers, and campers where theft prevention is a priority. The heavy-duty steel body is strong enough to withstand cutting attempts, and the warning tag reminds you to remove it before hitching. If you value ease of use without sacrificing security, this model delivers a practical solution.

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• More Convenient with Handle, Compared with other kingpin lock, BOYISEN trailer kingpin Lock add handle and turn cylinder outward instead of downward, more convenient while lock or unlock for 5th wheel
• Keyed Unique, no worry about another BOYISEN kingpin lock owner will have the same key. BOYISEN anti theft trailer lock using blossom lock, not easy to break; Come with 3 keys for your lock, so you can keep one as backup
• Heavy Duty Construction: This 5th wheel hitch lock is made of solid steel instead of casting steel, strong enough for weather resistant, hard to break. The heavy duty steel will add more difficulties for steal drills, and lasts for years
• Key Lost? No Worrying! In 2025 batches locks, there's a key ID printed on the key, please note it down or take a photo of it, provide us with the key ID to copy the key if your keys are lost
• High Visibility: This Kingpin lock is designed with a warning tag, so you could notice if it is still stay in place, and remind you of removing it when you want to hitching
• Universal Fit: ideal for trucking companies, RV dealers or fleet drivers, used for RVs, Boats and Campers Semi-Truck

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RVMATE 5th Wheel Lock – Heavy Duty Steel with Warning Tag

The RVMATE king pin lock is built from heavy-duty steel with electrostatic surface treatment for durability and weather resistance. Its universal fit accommodates 50 mm diameter pins, and the bright yellow warning tag provides a strong visual deterrent. The welded construction ensures the lock body remains robust against tampering, giving you peace of mind when your trailer is unattended.

This lock is designed for fifth wheels, semi trailers, RVs, and containers, making it a versatile security accessory. The easy-to-use design lets you slide it onto the kingpin and secure it quickly. If you need a reliable lock that combines strength with a clear warning signal, the RVMATE is a straightforward choice that won’t let you down.

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• [Keep Your 5th Wheel Secure] : King pin lock can prevent thieves from connecting your fifth wheel kingpin and avoid unauthorized movement. The durable construction, eye-catching yellow lock and tag serve as a warning and deterrent against theft to keep your 5th wheel secure.
• [Dimension]: The dimension of the trailer king pin lock is 83 mm in height, with an internal diameter of 74mm, a universal fit for 50 mm diameter trailer pins. Thus, the lock can be widely applied in semi trailers, 5th wheels, trucks, boats, containers and many other scenarios.
• [High Quality Material]: Trailer king pin is made of heavy duty steel copper, processed with welding construction. The surface adopts electrostatic treatment, featuring the body with weather resistance and anti-rust, making it sturdy enough and hard to break even by experienced thieves. Therefore effectively increase the safety factor and reduce the probability of theft when installed onto trailer.
• [Warning Tag]: The main tone of bright yellow designed as a sign of strong visible warning. The chain with fluorescent warning tag hanging down passes on message to someone to try and steal : Caution! King pin lock installed! If a would-be thief sees the lock, they'll likely move on to an easier target.
• [Easy to Use]: The trailer hitch lock is rather easy to use. You just need to engage the lock onto the trailer hitch, then insert the key into lock cylinder and rotate 180 degrees, the king pin lock firmly installed. (Attention: Every lock has its own keys. Different locks don't share the keys.)

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METOWARE 5th Wheel King Pin Lock – High-Strength Iron with Red Tag

The METOWARE king pin lock uses high-strength iron with a double-layer electrostatic coating for durability and weather resistance. It comes with a 12-inch chain and a bright red warning label tag that reminds you to remove it before hitching, preventing accidental damage. The precision anti-theft design encloses the main pin to effectively resist drilling and cutting attempts.

Locking and unlocking takes just seconds, and the package includes two keys for convenience. This lock is suitable for fifth wheels, RVs, semi trailers, and campers where quick installation matters. If you want a lock that balances strength with a clear visual reminder, the METOWARE offers a practical and affordable solution for everyday use.

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• EYE-CATCHING WARNING LABELS:This 5th wheel King Pin lock comes with a 12-inch chain and bright red warning label tag attachment that will remind you to remove it before hitching. Each warning label has a warning message in English to keep you safe.
• HIGH STRENGTH MATERIAL:This king pin lock is made of high-strength iron for durability, weather resistance and resistance to damage. This lock is coated with a double layer of electrophoretic paint to prevent corrosion and rust for a more reliable performance, it is perfect for protecting your trailer on the road or hauling.
• UNIQUE DESIGN:The Kingpin lock is easy to lock and unlock, takes seconds to install and comes with two keys so you don't have to worry about losing them.
• PRECISION ANTI-THEFT DESIGN:This fifth wheel king pin lock can well enclose the main pin lock to effectively prevent drills, saws and other damaging tools. The heavy-duty precision mechanism protects your trailer perfectly so you don't have to worry about it.
• UNIVERSALITY:The 5th wheel king pin lock is the best choice for RVs, boats, and camping semi-trailers, the petite size can be applied to a wide range of vehicles, adding convenience to your journey.

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DETYI WA15 5050 Fifth Wheel Kingpin – Weldable Replacement

The DETYI WA15 5050 kingpin is a direct replacement for models like Dayton 11-0212 and Batco 11-200, designed for welded installation to create a permanent bond to your trailer chassis. Made from high-strength steel, it withstands intense torsional forces and stress from uneven terrain, delivering reliable towing power. The compact design ensures compatibility with many fifth wheel setups.

This kingpin is ideal for those needing a replacement pin rather than a lock, offering a durable solution for heavy-duty towing. The forged construction provides long-lasting performance, and the weldable design means you can install it securely. If your current kingpin is worn or damaged, this DETYI pin is a robust choice that restores your trailer’s towing capability.

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• [Wide Model Compatibility] This kingpin is a direct replacement for the WA15 5050 kingpin and cross-compatible with major OEM part numbers including Dayton 11-0212, Batco 11-200, r 13101, Standard 20BWPM698, and 20SIR700. Please verify fitment for your specific trailer model before purchase.
• [Secure Welded Installation] The forged trailer king pin is specifically engineered for welded installation, creating a permanent, high-strength bond to your trailer chassis. This method provides superior stability and durability over traditional bolted connections, ensuring maximum safety for your cargo and vehicle.
• [Powerful Towing Capacity] Built with a robust, compact design to withstand intense torsional forces and stress from uneven terrain. It delivers reliable and enhanced towing power, making it an ideal connection point for heavy-duty applications like grain trailers and industrial equipment.
• [Durable & Long-Lasting Construction] Crafted from high-strength steel, our trailer king pin offers exceptional load-bearing capacity and fatigue resistance. This robust construction effectively prevents deformation and wear, guaranteeing an extended service life and significantly reducing your long-term maintenance and replacement costs.
• [Effortless Direct Replacement] This fifth-wheel trailer kingpin features a one-piece integrated design, which simplifies the process—simply remove the old kingpin and install the new one in its place. Get your trailer back in operation quickly with minimal downtime. Its userfriendly- minimizes downtime, getting your trailer back on road.

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Equipment Lock Heavy Duty 5th Wheel King Pin Lock – Powder Coated Steel

The Equipment Lock Company’s king pin lock features a high-security barrel lock system that fully covers your trailer’s 2-inch kingpin, making it impossible to attach a hitch without removal. Constructed from high-quality alloy steel with a bright red powder coating, it resists rust and corrosion while providing a visible deterrent. No mounting is required—simply slide it onto the kingpin and secure it with the included key.

This lock is designed for fifth wheel RVs and trailers, offering maximum security against theft. The user-friendly operation means you can secure your trailer in seconds, and the durable coating ensures long-lasting performance. If you prioritize a straightforward, heavy-duty lock that covers the entire kingpin, this model delivers reliable protection with minimal effort.

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• KINGPIN LOCK FOR 5TH WHEEL: The ideal addition to your fifth wheel RV accessories, the Equipment Lock Heavy Duty Kingpin Lock is a long-lasting, reliable universal solution to trailer and RV theft, providing high strength,unmatched protection for your trailer.
• MAXIMUM SECURITY: The Equipment Lock Heavy Duty 5th wheel RV kingpin lock features a high security barrel lock system and fully covers your trailer’s 2" kingpin, making it impossible for others to hitch to it and drive away.
• EASY OPERATION: No mounting required. Simply slide the lock onto the kingpin, secure it with the included key, and you’re ready to go. The user-friendly design makes securing your trailer quick and hassle-free.
• HEAVY DUTY POWDER COATED STEEL: Constructed from high-quality alloy steel with a bright red powder-coated finish for maximum visibility and corrosion resistance. This heavy duty design helps deter theft while providing long-term durability against weather and wear.
• KEYED SECURITY LOCK: The built-in high security barrel key lock system includes 2 keys with every purchase.
• HIGH QUALITY LOCK SYSTEM: Distinguished by its signature red finish, every lock is protected by a steel-locking structure that can withstand thousands of pounds of force. But it doesn’t stop there! Each device is powder coated before a series of quality assurance checks to ensure security and reliability.

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Buyer’s Guide: What to Consider

Choosing the right king pin for your fifth wheel involves balancing security, durability, and ease of use. Consider these key factors to find the best fit for your needs.

• Material Strength: Look for solid steel or high-strength iron for durability. Welded construction and coatings like electrostatic or powder coating add weather resistance.
• Fit and Compatibility: Ensure the lock fits your kingpin diameter (usually 2 inches). Replacement pins must match OEM part numbers for proper installation.
• Security Features: Consider locks with unique keys, anti-drill designs, or high-security barrel systems. Warning tags also deter thieves and remind you to remove the lock.
• Ease of Use: Handles, chains, and quick slide-on designs make locking and unlocking convenient. Choose a lock that you can operate without frustration.
• Installation Type: Locks require no installation, while replacement pins need welding. Decide whether you need a temporary security solution or a permanent replacement.

Conclusion

Securing your fifth wheel trailer starts with a quality king pin lock or replacement pin. The BOYISEN offers convenient handling, while the RVMATE and METOWARE provide reliable security with visible warnings. For a permanent replacement, the DETYI kingpin is a strong choice, and the Equipment Lock gives full coverage protection.

Consider your specific needs—whether you prioritize ease of use, maximum security, or a weldable replacement—and choose the product that best fits your setup. Any of these options will help keep your trailer safe and ready for the road.