Best Fifth Wheel King Pin Locks for Ultimate Security

Last Updated on June 8, 2025

You want a fifth wheel king pin lock that’s tough, reliable, and weather-resistant to keep your trailer secure. Look for heavy-duty steel construction with corrosion-proof coatings and anti-theft features like disk locks or steel cages.

Bright warning tags and easy installation make them user-friendly and effective deterrents. Most fit standard 2-inch pins, and models vary in price. Discover which locks combine durability and security best to protect your investment year-round.

Key Takeaways

• Heavy-duty alloy steel construction with corrosion-resistant coatings ensures long-lasting protection against theft and environmental damage.
• Advanced locking mechanisms resist picking, drilling, and forced entry, providing strong theft deterrence for standard 2-inch fifth wheel king pins.
• Bright finishes and visible warning tags enhance security by deterring tampering and accidental misuse during hitching operations.
• Compact, user-friendly designs allow easy installation, removal, and storage without special tools, suitable for both novice and experienced users.
• Durable weather-resistant coatings and enclosed keyholes maintain lock functionality in harsh conditions like rain, snow, and road salt exposure.

BOYISEN 5th Wheel King Pin Anti-Theft Hitch Lock for RVs and Trailers

If you’re looking for a reliable way to secure your RV or trailer, the BOYISEN 5th Wheel King Pin Anti Theft Hitch Lock stands out with its easy-to-use handle and robust, drill-resistant steel construction that keeps your vehicle safe without the hassle of traditional locks.

Its outward-turn cylinder and weather-resistant coating make locking simple and durable. You’ll appreciate the bright warning tag reminding you to remove it before hitching and the included three unique keys for added convenience.

Trusted by thousands, this lock fits standard king pins and delivers heavy-duty protection against theft, giving you peace of mind wherever you park.

Best For: RV and trailer owners seeking a durable, easy-to-use anti-theft lock that fits standard fifth wheel king pins and provides strong theft deterrence.

Pros:

• Heavy-duty, drill-resistant steel construction offers robust security.
• Convenient handle and outward-turn cylinder design simplifies locking and unlocking.
• Bright warning tag enhances visibility and prevents accidental hitching with the lock in place.

Cons:

• Slightly bulky design might be less convenient for storage when not in use.

CURT 23255 5th Wheel Trailer Lock for 2-Inch King Pin

You’ll find the CURT 23255 5th Wheel Trailer Lock ideal for securing trailers with a standard 2-inch king pin, especially if you want a lightweight yet tough solution that’s easy to install and resistant to tampering.

Made from high-strength aluminum and steel, it fits most 5th wheel trailers, RVs, and toy haulers. Its carbide black powder coat finish guards against corrosion, while a watertight dust cap protects internal parts.

You’ll appreciate its compact size, key-operated design, and reliable theft deterrence. Plus, it comes with two keys and is known for its durability and ease of use.

Best For: Owners of 5th wheel trailers, RVs, and toy haulers seeking a lightweight, durable, and easy-to-install lock for standard 2-inch king pins to prevent theft.

Pros:

• Made of high-strength aluminum and steel with a corrosion-resistant carbide black powder coat finish.
• Compact and lightweight design with a watertight dust cap protecting internal components.
• Includes two keys and offers reliable theft deterrence with positive customer reviews for durability and ease of use.

Cons:

• May be limited to compatibility with standard 2-inch king pins only.

Trimax TFW80HD 5th Wheel King Pin Lock, Heavy Duty Trailer Lock

Offering robust theft protection with its hardened steel construction and bright red epoxy coating, the Trimax TFW80HD 5th Wheel King Pin Lock is perfect for anyone who needs quick, reliable security for trailers or RVs.

You’ll appreciate its easy push-button lock mechanism and full collar design that prevents grease transfer and adds extra protection against tampering.

This heavy-duty lock fits snugly over the kingpin, resisting prying and cutting attempts. Weatherproof and durable, it holds up in harsh conditions.

Best For: Owners of trailers, RVs, and fifth wheels seeking a durable, easy-to-use, and highly visible king pin lock for reliable theft deterrence.

Pros:

• Hardened steel construction with bright red epoxy coating offers strong theft protection and high visibility.
• Easy push-button lock mechanism allows for quick and hassle-free installation and removal.
• Weatherproof design with a full collar prevents grease transfer and withstands harsh environmental conditions.

Cons:

• Internal paint may hinder the perfect fit, suggesting machining could improve installation.

Heavy-Duty King Pin Lock for Fifth Wheel Trailers with Caution Tag and Air Freshener

Heavy-Duty King Pin Lock by Jayour suits trailer owners who need strong, visible theft deterrence without sacrificing ease of use. Made from alloy steel, this lock features a bright yellow finish and a high-visibility caution tag that warns off thieves and prevents accidental hitching.

You’ll appreciate its quick installation and compatibility with slider hitch guides. Weighing just over 4 pounds, it’s sturdy but manageable.

While not foolproof against determined thieves with tools, it considerably raises the effort needed to steal your trailer. Many users praise its strength, visibility, and ease of handling, making it a top choice for basic trailer security.

Best For: Trailer and fifth wheel owners seeking a durable, highly visible, and easy-to-use anti-theft lock that deters theft and prevents accidental hitching.

Pros:

• Heavy-duty alloy steel construction offers strong theft deterrence and durability.
• Bright yellow finish and high-visibility caution tag enhance safety and theft prevention.
• Quick installation and compatibility with slider hitch guides make it user-friendly.

Cons:

• May only offer limited protection against determined thieves with specialized tools.

Reese Towpower 63251 Fifth Wheel King Pin Lock

If you need a reliable lock that fits all king pins and deters theft with bright visibility, the Reese Towpower 63251 Fifth Wheel King Pin Lock is an excellent choice.

Its durable T6 tempered aluminum body and bright yellow finish offer strong protection and easy theft deterrence. You’ll appreciate the simple installation and lightweight design, making setup quick whether you’re a novice or pro.

The dust cap shields the lock from elements, ensuring lasting performance. Plus, it comes with two keys. This trusted Reese model blends security, convenience, and visibility for your fifth wheel trailer.

Best For: RV owners and fifth wheel trailer users seeking a durable, easy-to-install king pin lock that offers bright visibility and reliable theft deterrence.

Pros:

• Durable T6 tempered aluminum construction provides strong security and long-lasting use.
• Bright yellow finish enhances visibility, effectively deterring potential thieves.
• Simple installation and lightweight design make it user-friendly for both novices and professionals.

Cons:

• The locking bolt could be more robust for added security.
• May be limited to fifth wheel king pin applications and not suitable for other hitch types.

TKP-10 5th Wheel King Pin Lock, Anti-Theft Trailer, Heavy Duty Steel

You’ll appreciate the TKP-10 5th Wheel King Pin Lock if you need reliable protection for untethered trailers like trucks, boats, or RVs.

Made from heavy-duty cast alloy steel, this lock fits all standard trailers and features a conical shape with a convenient handle for easy use.

Its nine-cylinder disk-locking mechanism and rotating disk technology provide tough security against picking. Installation is straightforward: slide it over the kingpin until it clicks.

With regular lubrication and proper care, this durable, American-made lock deters theft effectively, offering peace of mind for your valuable trailer cargo.

Best For: Trailer owners seeking a heavy-duty, reliable anti-theft lock to secure untethered trailers such as trucks, boats, and RVs.

Pros:

• Made from durable heavy-duty cast alloy steel for robust security.
• Features a nine-cylinder disk-locking mechanism and rotating disk technology to resist picking.
• Easy installation and removal with a convenient handle and simple locking mechanism.

Cons:

• No lock may provide complete security; it primarily serves as a theft deterrent rather than foolproof protection.

RVMATE Heavy Duty Steel 5th Wheel King Pin Lock with Anti-Theft Warning Tag

RVMATE’s 5th Wheel King Pin Lock stands out for RV owners and trailer users who want a reliable theft deterrent with clear visual warnings. Made from heavy-duty alloy steel with anti-rust treatment, it fits universal 50mm kingpins and resists tampering and weather.

You’ll appreciate the bright yellow warning tag and chain that signal thieves to stay away. Installation is straightforward—just insert and turn the key 180 degrees.

While the key mechanism may feel stiff initially and the plastic chain could break, users praise its durability and security, making it a trusted choice for protecting your trailer or RV.

Best For: RV owners and trailer users seeking a heavy-duty, visible, and reliable theft deterrent for securing 5th wheel kingpins.

Pros:

• Constructed from heavy-duty alloy steel with anti-rust treatment for durability and tamper resistance.
• Features a bright yellow warning tag and chain for clear visual theft deterrence.
• Easy installation with a key mechanism that securely locks with a simple 180-degree turn.

Cons:

• Initial stiffness in the key lock mechanism can make operation less smooth at first.
• Higher price point compared to some alternatives, though justified by build quality and security.

DC Cargo Mall 5th Wheel King Pin Lock for RV & Semi Trailers

Designed for RV owners and semi-trailer operators who need reliable, professional-grade security, the DC Cargo Mall 5th Wheel King Pin Lock combines heavy-duty construction with weather-resistant materials.

Made from reinforced No. 45 steel alloy and coated to resist rust, it encloses your kingpin in a tough steel cage that deters drills and saws.

The bright yellow finish boosts visibility, warning potential thieves. Installation is simple, just slide it on, lock with the included keys, and you’re secure.

A red warning tag reminds you to remove it before hitching, preventing damage. Customers love its durability and effective theft protection.

Best For: RV owners and semi-trailer operators seeking a durable, professional-grade kingpin lock that offers strong theft deterrence and weather resistance.

Pros:

• Heavy-duty reinforced No. 45 steel alloy construction with rustproof coating for long-lasting durability.
• Bright yellow finish and red warning tag increase visibility and prevent accidental damage.
• Easy installation and removal with included keys; smooth locking mechanism resistant to break-in tools.

Cons:

• May not be app-controlled or equipped with advanced electronic features.

METOWARE 5th Wheel King Pin Lock with Warning Tag (Black)

Who needs reliable security for their RV or trailer? The METOWARE 5th Wheel King Pin Lock with Warning Tag (Black) offers just that. Made from high-strength iron with a corrosion-resistant coating, it resists weather and tampering.

Its precision anti-theft design encloses the kingpin, blocking drilling and sawing attempts. You’ll appreciate the included 12-inch chain and bright red warning tag that reminds you to remove the lock before hitching.

Weighing just 2.44 pounds, it’s easy to install and remove in seconds. It’s a solid choice for ultimate security.

Best For: RV, semi-trailer, camper, and trailer owners seeking a durable and secure anti-theft king pin lock with easy installation and weather resistance.

Pros:

• Constructed from high-strength iron with corrosion-resistant double-layer coating for long-lasting durability.
• Precision anti-theft design protects against drilling, sawing, and tampering.
• Includes a 12-inch chain and bright red warning tag for safety reminders and convenience.

Cons:

• Universal fit may not be compatible with all king pin sizes or specialized trailers.

BYERN AUTO 5th Wheel King Pin Lock with Anti-Theft Warning Tag & 2 Keys (Black)

If you need a reliable way to protect your RV, trailer, or camper from theft, the BYERN AUTO 5th Wheel King Pin Lock with Anti-Theft Warning Tag & 2 Keys offers heavy-duty security with ease of use.

Made from weatherproof alloy steel and copper, it resists rust and harsh conditions. The lock’s pin tumbler mechanism lets you secure or release it with a simple 180-degree turn using one of the two included keys.

Its universal fit suits various trailers, while the warning tag reminds you to remove it before hitching. You’ll appreciate its durability and trusted protection.

Best For: RV owners, trailer users, and trucking companies seeking a durable, weather-resistant, and easy-to-use lock to secure their trailers against theft.

Pros:

• Heavy-duty alloy steel and copper construction ensures rust resistance and long-lasting durability.
• Simple pin tumbler mechanism with two keys provides convenient and reliable locking and unlocking.
• Universal fit with an anti-theft warning tag enhances security and user awareness before hitching.

Cons:

• May be limited to fifth wheel king pin applications and not suitable for other types of trailer locks.

5th Wheel Heavy Duty Steel King Pin Lock with Warning Tag for Trailers and Campers

You’ll find the 5th Wheel Heavy Duty Steel King Pin Lock with Warning Tag ideal for securing trailers and campers, especially if you manage an RV fleet or frequently park in high-risk areas.

Made from solid alloy steel, it resists rust and corrosion, offering durable anti-theft protection. Its snug fit around the kingpin and bright yellow warning tag help prevent theft and accidental injuries.

While easy to install and visually deterring, some users note concerns about the lock’s security and universal key issue. Overall, it delivers solid peace of mind for everyday trailer security needs.

Best For: RV owners, fleet drivers, and trailer managers looking for a durable, corrosion-resistant kingpin lock with a visual deterrent for theft and safety.

Pros:

• Made from solid alloy steel that resists rust and corrosion for long-lasting durability.
• Bright yellow fluorescent warning tag improves visibility and reduces accidental injuries.
• Easy to install with a snug fit around the king pin, providing a visual and physical deterrent.

Cons:

• The lock pin may barely extend, making it easier to shake off or remove by hand.

Stay Smart, Stay Secure: What to Consider When Choosing a Fifth Wheel King Pin Lock?

When choosing a fifth wheel kingpin lock, you’ll want to focus on:

Lock Material Durability

Although many factors influence the effectiveness of a fifth wheel kingpin lock, the durability of its materials plays a crucial role in protecting your trailer. You want a lock made from hardened or alloy steel since these materials resist cutting, bending, and tampering better than others.

Look for weather-resistant coatings like powder coating or epoxy paint to prevent rust and corrosion, especially if your lock faces rain, snow, or UV exposure. Heavy-duty materials combined with reinforced designs, such as full collar covers, further improve resistance against physical attacks.

Choosing a lock with corrosion-resistant materials ensures it won’t degrade quickly outdoors, maintaining security over time. Prioritizing these durable features means your investment will offer reliable protection for years under tough conditions.

Security Mechanism Type

Since the security mechanism type directly affects how well your fifth wheel king pin lock protects your trailer, choosing the right one is essential. You’ll find key-based locks, combination locks, and electronic or digital locks, each with unique benefits.

Key locks are common and reliable, offering strong resistance against picking and tampering. Combination locks free you from carrying keys but can be vulnerable if someone guesses or shares your code.

Electronic locks provide advanced security with app or keypad controls but depend on batteries and connectivity, which might be a downside.

Consider how resistant each mechanism is to picking, cutting, or forced removal. Match your choice to your security needs and environment to ensure your trailer stays safe and secure.

Visibility and Warning Features

Choose a lock featuring bright colors and high-visibility warning tags. These visual cues immediately signal that your trailer is protected, discouraging casual thieves from attempting tampering.

Warning tags with clear messages like “Remove Before Hitching” also help prevent accidental damage and ensure you connect your trailer properly. Opt for locks incorporating reflective or fluorescent materials to boost visibility in low-light conditions, further enhancing their deterrent effect.

By alerting both potential thieves and bystanders, these visibility and warning features considerably contribute to theft prevention, keeping your trailer safer whenever it’s parked.

Fit and Compatibility

When choosing a fifth wheel king pin lock, you need to make sure it fits your trailer’s king pin perfectly to provide reliable security. Start by confirming the lock matches your king pin’s size—typically 2 or 3 inches in diameter.

A secure fit means no gaps or looseness, which could allow prying or accidental removal. Check if the lock’s mounting mechanism suits your trailer or RV model, ensuring a snug attachment. Look for locks offering universal compatibility across various brands to avoid mismatch issues.

If your trailer’s king pin varies, consider locks with adjustable features or multiple size options. Prioritizing fit and compatibility guarantees your lock won’t fail when you need it most, keeping your trailer protected with confidence.

Weather Resistance Coating

Although a secure fit is essential, you also need to take into account a fifth wheel king pin lock’s weather resistance coating to guarantee long-lasting protection. This coating shields the lock from rust, corrosion, and environmental damage caused by rain, snow, and humidity.

Look for finishes like epoxy, powder, or electrostatic, as they create a strong barrier against moisture and UV rays. A quality coating ensures your lock keeps operating smoothly and securely, even in harsh outdoor conditions. It also prevents internal parts from deteriorating, reducing the risk of jamming or malfunction.

If you’re in an area with extreme weather, choosing a lock with a durable weather-resistant finish is critical to maintain reliable security and extend the lock’s lifespan over time.

Ease of Installation

Protective coatings keep your fifth wheel kingpin lock running smoothly in tough weather, but ease of installation also plays a big role in your overall experience. You want a lock that’s simple to install within minutes, without needing specialized tools.

Choose one with an intuitive locking mechanism, like a key lock or push-button system, so you can quickly engage and disengage it. The design should fit easily over the kingpin and include clear instructions or visual cues to guide you.

Features like warning tags or bright colors help ensure you don’t accidentally leave the lock on or reuse it improperly. Ideally, pick a reusable lock that performs consistently without complex steps, making it perfect whether you’re a seasoned pro or a first-time user.

Frequently Asked Questions

How Do I Properly Install a Fifth Wheel King Pin Lock?

To properly install a fifth wheel king pin lock, start by cleaning the king pin and surrounding area. Slide the lock onto the king pin, ensuring it fits snugly. Then, turn the locking mechanism until it clicks securely.

Double-check that the lock is firmly in place and can’t be moved easily. Always keep your key handy and periodically inspect the lock for wear or damage to maintain security.

Can These Locks Withstand Extreme Weather Conditions?

You’ll find many king pin locks are designed to handle extreme weather conditions. Manufacturers use rust-resistant materials like stainless steel and weatherproof coatings to guarantee durability.

Still, it’s smart to check product specs and user reviews to confirm performance in harsh environments. If you regularly face rain, snow, or intense heat, choose a lock specifically built for those conditions to keep your fifth wheel secure no matter the weather.

Are Replacement Keys Available if Lost?

If you lose your key, you can usually get a replacement for fifth wheel king pin locks. Most manufacturers offer replacement keys, but you’ll need proof of purchase or the lock’s serial number.

Some brands also provide key codes, making it easier to order duplicates. It’s a good idea to register your lock or keep a spare key in a safe place to avoid any hassle in case you lose the original.

How Do These Locks Affect Insurance Premiums?

When you install high-quality king pin locks, your insurance provider might offer lower premiums because they see reduced theft risk. You should check with your insurer to confirm if your specific lock qualifies for discounts.

Having solid security measures in place shows you’re serious about protecting your trailer, which can positively impact your rates. Don’t forget to keep documentation of your lock purchase handy it helps when you negotiate or file claims.

What Maintenance Is Required for King Pin Locks?

Maintaining your king pin lock is like keeping a bike chain oiled it guarantees smooth operation. You’ll want to regularly clean the lock to remove dirt and grime, then lubricate the internal mechanism with a graphite or silicone-based lubricant.

Avoid using oil-based lubricants as they can attract dust. Also, inspect for wear or damage, and keep the lock covered when not in use to protect it from the elements.

Turn Your Trailer Into a Fortress by Choosing the Right King Pin Lock

When it comes to securing your fifth wheel, choosing the right king pin lock is essential. Did you know that over 60% of trailer thefts happen due to weak or no king pin locks?

Don’t become a statistic invest in a heavy-duty lock that fits your needs and offers peace of mind. With options like the BOYISEN or CURT locks, you’ll keep your trailer safe and sound wherever you go. Stay smart, stay secure.

Last update on 2025-06-14 / Affiliate links / Images from Amazon Product Advertising API