Best King Pin for 5th Wheel: Top 5 Picks for Secure Towing and Long-Lasting Durability 2026
The best king pin for a 5th wheel provides a secure connection, corrosion resistance, and easy installation. This guide highlights five reliable options and explains who each is best for, helping you choose the right pin for your trailer setup. Ideal buyers include heavy-haul operators, RV enthusiasts, fleet managers, and DIY trailer owners seeking strength, compatibility, and ease of use.
Quick comparison of top picks
- Buyers Products KP20050: Best overall for reliability and weldable durability in commercial setups.
- ELSOON WA15 5050: Best for heavy-duty towing with broad compatibility.
- WA15 5050 Fifth Wheel Kingpin (Detyi): Best for direct replacement and wide OEM compatibility.
- METOWARE King Pin Lock: Best for theft deterrence and added security.
- Schumaho Tripod Stabilizer: Best for stabilizing the hitch during loading/unloading (not a pin, but a support accessory).
Buyers Products KP20050 Forged Trailer King Pin
The KP20050 is a 2″ SAE king pin with a bolster plate that maintains hardness in the 302-363 BHN range. Its weldable design favors commercial fleets and professional installers who need a strong, permanent attachment. Best for: commercial trailers and long-term mounts where welding is feasible. Limitation: welded installation requires proper technique and may not suit quick-change applications.
ELSOON WA15 5050 Forged King Pin
Designed for 5th-wheel trailers, the WA15 5050 forged steel king pin features a 2″ axle collar and a 3/8″ bolster plate. It’s built for heavy-duty towing and longevity, making it suitable for frequent, high-demand use. Best for: trailers needing robust, long-lasting components that fit a broad range of fifth-wheel configurations. Caution: verify compatibility with your trailer model prior to purchase.
WA15 5050 Fifth Wheel Kingpin (Detyi)
This kingpin is a direct replacement in the WA15 5050 series and cross-compatible with major OEM numbers such as Dayton 11-0212 and Batco 11-200. It offers a welded installation and a compact design for reliable towing power on heavy-duty applications. Best for: users needing wide compatibility and a secure welded fit. Choose this if your trailer matches the listed OEM cross-compatibility; avoid if your model isn’t listed.
METOWARE King Pin Lock With Warning Tag
The METOWARE lock includes a 12-inch chain and a bright warning tag to remind owners to remove the lock before hitching. Made from high-strength steel with weather-resistant coating, it enhances trailer security. Best for: protecting against theft when the trailer is parked or unattended. Caution: locks are only as secure as the surrounding hitch setup; ensure proper installation and key management.
KING PIN – WELD ON FOR 5TH WHEEL TRAILER
National Drivetrain offers a weld-on king pin with a 2″ collar and a 3/8″ bolster plate. While straightforward, it’s best suited for installations where welding is already part of the trailer’s maintenance plan. Best for: users needing a direct, welded connection with standard dimensions. Limitation: availability and fit depend on your trailer’s exact model and chassis configuration.
BYOYISEN 5th Wheel King Pin Lock
BOYISEN’s lock features a handle-assisted design and three keys, built from solid steel with weather resistance. It prioritizes ease of use and theft deterrence. Best for: owners seeking practical security with spare keys included. Limitation: ensure the lock mechanism remains free of debris to maintain ease of use in harsh environments.
BYERN AUTO King Pin Lock
The BYERN AUTO lock offers anti-theft functionality with a warning tag and two keys. It emphasizes heavy-duty steel construction and weather resistance for long-term outdoor use. Best for: RVs and semi-trailers where theft deterrence is a priority. Limitation: like other locks, it does not affect hitch alignment or towing performance directly; it secures only the king pin connection when not in use.
Buying Guide: King Pin Choices And How To Decide
- Material and hardening: Look for forged steel with heat-treated hardening to resist wear and impact.
- Mounting method: Weld-on pins offer permanent, strong connections; bolted pins are easier to replace but may be less durable.
- Compatibility: Verify collar size (commonly 2″) and bolster plate thickness (3/8″ or similar) with your trailer model.
- Security features: If security is a priority, consider locking pins or anti-theft mechanisms with clear warning tags and multiple keys.
- Installation considerations: Some pins require professional welding; others are straightforward bolt-in or clip-on designs.
- Durability in weather: Choose corrosion-resistant finishes and coatings for exposed environments.
- Whether you need a stabilizer: If you routinely hitch and unhitch heavy loads, a tripod stabilizer can reduce setup time and maneuvering effort.
Frequently Asked Questions
- What is a king pin’s main function on a 5th wheel trailer?
It provides the primary connection point between the truck and trailer, allowing pivoting and secure towing.
- Should I weld or bolt my king pin in place?
Weld-on pins offer permanent strength and are preferred for many commercial applications; bolt-in pins are easier to replace but may be less durable over time.
- How do I verify king pin compatibility with my trailer?
Check collar size (2″), bolster plate thickness (3/8″), and cross-compatibility with OEM part numbers listed by the manufacturer.
- Are king pin locks 100% secure?
No accessory is completely foolproof; locks enhance security but should be used with proper hitch maintenance and secure storage when not in use.
- Can I use a king pin stabilizer with a standard fifth-wheel setup?
Yes, stabilizers help minimize movement during hitching, aligning, and loading, especially on uneven surfaces.