5 Best Fifth Wheel Tow Hitch for Semi: Options Compared

Choosing the right fifth wheel tow hitch for your semi can feel overwhelming with so many options on the market. Whether you need a secure king pin lock, a versatile gooseneck adapter, or a heavy-duty hitch, this guide breaks down the top five choices to help you make an informed decision.

We’ve compared key features like weight capacity, ease of installation, and security to match different towing needs. Read on to find the perfect fit for your setup.

BOYISEN 5th Wheel King Pin Lock – Anti Theft Security

The BOYISEN 5th Wheel King Pin Lock is designed with a convenient handle that makes locking and unlocking easier compared to traditional downward-turning locks. Its solid steel construction, rather than casting steel, provides excellent weather resistance and durability, making it a tough barrier against theft. The blossom lock mechanism is engineered to be hard to break, giving you peace of mind when your trailer is parked.

Each lock comes with three keys and a unique key ID printed on the key for 2025 batches, so you won’t have to worry about key duplication. The keyed unique feature ensures that no other BOYISEN lock owner will share your key, adding an extra layer of security. This lock is a practical choice for securing your fifth wheel or semi trailer when not in use.

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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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PSAUTO Fifth Wheel to Gooseneck Adapter – Adjustable Height

The PSAUTO Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter converts your fifth wheel into a gooseneck setup in minutes, offering flexibility for different towing configurations. Its adjustable height range from 12 to 16 inches allows you to fine-tune the connection to match your truck and trailer, improving ride quality and stability. The cushioned design helps absorb road shocks, reducing wear on your trailer and cargo.

This adapter is ideal for semi owners who need to switch between fifth wheel and gooseneck hitches without investing in a separate system. The quick conversion saves time and effort, making it a versatile addition to your towing gear. While it doesn’t include a locking mechanism, it pairs well with a king pin lock for added security.

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• The cushioned gooseneck adapter converts your 5th wheel into a gooseneck within minutes.

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Andersen Hitches Gen 3 Ultimate Connection – Lightweight Gooseneck

The Andersen Hitches Gen 3 Ultimate 5th Wheel Connection weighs only 37 pounds yet is rated for 24,000 lbs GTWR and 4,500 lbs tongue weight, making it one of the lightest heavy-duty options available. Its two height settings (17-9/16 or 19-9/16 inches) fit most trucks and trailers, and the compact 3-1/4 offset base provides clearance for tight spaces. The patented remote latching cable lets you connect and disconnect from outside the truck bed, keeping you clean and safe.

This hitch is SAE tested and certified for maximum safety, ensuring reliable performance under heavy loads. The lightweight design allows for one-person installation or removal in under five minutes, which is a major convenience for frequent users. If you prioritize ease of use and high capacity, this gooseneck adapter is a standout choice for your semi.

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• ONLY 37 LBS YET RATED FOR 24000 LBS GTWR: The Gen 3 Ultimate Connection is lightweight enough for one-person install or removal in under 5 minutes while supporting up to 24,000 lbs GTWR and 4,500 lbs tongue weight.
• TWO HEIGHT SETTINGS FIT MOST TRUCKS AND TRAILERS: Choose from 17-9/16" or 19-9/16" positions from the truck bed to the top of the ball mount. The compact 3-1/4" offset base provides stability without taking up space.
• PATENTED REMOTE LATCHING — NO CLIMBING IN THE BED: The remote latch cable lets you connect and disconnect the 5th wheel from outside the truck bed, making hitching fast, clean, and safe every time.
• SAE TESTED AND CERTIFIED FOR MAXIMUM SAFETY: Rigorously tested to meet SAE standards so you can tow with confidence on every trip, whether you're heading to a campsite, a race track, or a job site.
• PROUDLY MADE IN THE USA WITH EXPERT CRAFTSMANSHIP: Every Ultimate Connection is manufactured in America from high-quality aluminum and components. The gold standard in gooseneck 5th wheel hitches.

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CURT Q20 5th Wheel Hitch – Quiet Ride and Easy Operation

The CURT Q20 5th Wheel Hitch is engineered for a quiet towing experience, thanks to its spherical axial bearing that allows the head to move smoothly and reduce noise. It features a 3-position coupling indicator that clearly shows the status of your connection, so you can hitch with confidence. The single, short-throw handle promotes ergonomic operation, making coupling and uncoupling easier on your hands.

Safety-tested for 20,000 lbs gross trailer weight and 5,000 lbs vertical load, this hitch is built for heavy-duty use. Its black finish resists corrosion, and the robust construction ensures long-lasting performance. If you value a quiet ride and straightforward operation, the CURT Q20 is a reliable choice for your semi towing needs.

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• QUIET RIDE. This Q-series CURT 5th wheel hitch is engineered to promote the quietest 5th wheel towing possible. It features a spherical axial bearing that allows the head to easily tilt in any direction needed
• COUPLING INDICATOR. Built into this 5th wheel hitch is a 3-position indicator that shows the coupling status of the hitch and your trailer. It conveniently shows if the 5th wheel hitch is coupled, uncoupled or ready to tow
• EASY OPERATION. This CURT 5th wheel hitch operates with a single, short-throw handle to promote ergonomic operation and easier coupling of your 5th wheel trailer. The handle is also lockable for maximum security on the road
• SAFETY-TESTED. Tested and rated for 20,000 lbs. gross trailer weight and 5,000 lbs. vertical load, this 5th wheel hitch is capable of towing a variety of 5th wheels (limited to lowest-rated towing component). It tested to SAE J2638 specifications
• VERSATILE FIT. This 5th wheel hitch fits any industry-standard 5th wheel base rails, such as CURT rails #16104 and #16204 (rails and brackets sold separately) (Not compatible with articulating or turret-style pin boxes, such as Rota-Flex and Sidewinder)

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AMPLock U-PLS King Pin Lock – Heavy-Duty Anti Theft

The AMPLock U-PLS 1-Cylinder Strong King Pin Lock is built with a heavy-duty ductile cast iron body and stainless steel removable parts, offering superior resistance to corrosion and tampering. Its precision design helps prevent traction-based theft using chains or tools, making it a robust security solution for semi trailers and RVs. The push-to-lock system allows for quick installation without fumbling with keys, which is convenient when you’re in a hurry.

Manufactured in North America, this lock is engineered for a custom-molded fit that secures your king pin effectively. It comes keyed alike for commercial use, so you can use one key for multiple locks. If you need a durable, easy-to-use king pin lock that stands up to harsh conditions, the AMPLock is a top contender for protecting your trailer.

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• HEAVY-DUTY KING PIN LOCK FOR TRAILERS & RVs – This Strong-series king pin lock secures 5th wheel trailers, semi trailers, and commercial rigs with a custom-molded fit designed to eliminate wobble and prevent unauthorized towing. Built from ductile cast iron and stainless steel for superior strength, it reinforces travel trailer accessories, semi truck accessories, and trailer security while offering reliable protection for equipment stored or parked long-term.
• PRECISION DESIGN WITH INDUSTRIAL SECURITY – Featuring AMPLock’s engineered structure, this king pin lock for semi trailer setups helps prevent traction-based theft using chains or modified towing systems. Its advanced disc lock includes a rotating drill-resistant face and millions of unique combinations, making lock picking extremely difficult. Ideal for king pin locks for 5th wheel, RV trailer locks, and fifth wheel king pin lock applications within automotive towing.
• DURABLE MATERIALS WITH STAINLESS COMPONENTS – Manufactured in North America using ductile cast iron for the body and stainless steel for removable parts, this trailer pin lock resists corrosion, harsh weather, drilling attempts, and mechanical force. Whether protecting a semi trailer lock, securing a fifth wheel camper, or reinforcing commercial hauling equipment, its smooth and durable construction provides dependable year-round performance for fifth wheel in demanding conditions.
• EASY PUSH-TO-LOCK INSTALLATION FOR QUICK SECURITY – AMPLock’s smooth push-to-lock system allows instant installation without tools, making it one of the easiest upgrades for 5th wheel hitch lock users, trailer king pin lock systems, and hitch pin lock setups. The molded fit ensures a precise, stable connection with zero looseness, offering effortless day-to-day operation for RV owners, fleet managers, and trailer operators who also use trailer hitch pin locks across multiple setups.
• ANTI-THEFT DESIGN WITH KEYED-ALIKE OPTION – Designed for strong resistance against cutting, drilling, torches, and impact, this king pin lock enhances trailer security through industrial-grade engineering. The keyed-alike option lets users operate multiple locks with a single key, simplifying security management while maintaining high protection. Ideal for securing travel trailers, RVs, semi trailer king pins, and commercial equipment.

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Buyer’s Guide: What to Consider

When selecting a fifth wheel tow hitch for your semi, consider weight capacity, hitch type, and ease of use. These factors ensure safe and efficient towing.

• Weight Capacity: Ensure the hitch or lock matches your trailer's gross weight and tongue weight. Overloading can cause failure, so check ratings carefully.
• Hitch Type: Decide between a fifth wheel hitch, gooseneck adapter, or king pin lock based on your truck's setup and towing needs. Each serves a different purpose.
• Ease of Installation: Look for features like remote latching, push-to-lock, or adjustable height to simplify setup. Lightweight designs save time and effort.
• Security Features: King pin locks should have unique keys, solid construction, and tamper-resistant designs. Indicators on hitches help verify proper coupling.
• Durability and Materials: Choose products made from solid steel, ductile cast iron, or stainless steel for weather resistance. Corrosion protection extends lifespan.

Conclusion

Choosing the right fifth wheel tow hitch for your semi depends on your specific needs, whether it’s security, versatility, or ease of use. The BOYISEN and AMPLock locks offer robust anti-theft protection, while the PSAUTO and Andersen adapters provide flexible gooseneck options. The CURT Q20 delivers a quiet, reliable hitch for heavy-duty towing.

For most semi owners, the Andersen Hitches Gen 3 strikes the best balance of lightweight design and high capacity. Evaluate your setup and prioritize the features that matter most to you.