When towing trailers, securing your hitch pin against theft and accidental disconnection is crucial. The best locking trailer hitch pins provide strong, tamper-resistant protection while fitting various receiver sizes. Below is a summary of top options from trusted brands offering features like weather resistance, solid steel construction, and key-operated locks to give you peace of mind.
| Product | Brand | Pin Size | Receiver Fitment | Key Features |
|---|---|---|---|---|
| Rhino USA Trailer Hitch Pin | Rhino USA | 5/8 inch | 2.5 inch (Class V) | Weatherproof, solid steel, debris protection |
| Master Lock Receiver Lock | Master Lock | 1/2 & 5/8 inch | Fits Class I-IV | Swivel head, weather resistant, push-to-lock |
| CURT 23518 Black Trailer Hitch Lock | CURT | 5/8 inch | 2 inch receiver | High strength steel, 1/4 turn locking, barbell style |
| CZC AUTO Hitch Receiver Pin Lock | CZC AUTO | 5/8 inch | 2″ and 2.5″ Class III/IV | Carbon steel, 360° rotating head, weather sealed keyhole |
| TowWorks Extra Long Trailer Hitch Lock | TowWorks | 5/8 inch | 3 inch receivers & adjustable hitches | Extra long span, spring clip included, rubber O-rings |
Rhino USA Patented 5/8″ Locking Trailer Hitch Pin
The Rhino USA Trailer Hitch Pin is designed for Class V 2.5-inch trailer hitches, providing a durable and solid steel locking pin that ensures maximum security. This American-owned, family-operated brand offers a weatherproof design with patented debris protection to keep the lock mechanism functioning smoothly. Its tamper-resistant construction safeguards trailers, RVs, and tow trucks against theft, allowing for reliable and secure towing experiences.
This pin is compact at 2.5 inches long and fits snugly, providing peace of mind without excess bulk. The anti-theft features, combined with Rhino USA’s customer service support, make this hitch pin a robust choice for anyone seeking secure locking capability on larger hitch classes.
Master Lock Receiver Lock with Swivel Head
The Master Lock Receiver Lock is versatile, accommodating both 1/2 inch and 5/8 inch trailer hitch sizes suitable for Class I through IV hitches. It features a unique swivel head that rotates 360 degrees, allowing the keyway to conveniently face forward for easier unlocking and locking. The push-to-lock mechanism provides quick and secure fastening, eliminating concerns about incomplete locking.
Rated up to 3,500 lbs for 1/2-inch pins and 10,000 lbs for 5/8-inch pins, this weather-resistant lock is excellent for protecting trailers, RVs, and other towed assets. Its compact design and robust locking system make it a reliable anti-theft option.
CURT Black 5/8-Inch Trailer Hitch Lock
CURT’s 5/8-inch diameter hitch lock is crafted from high-strength steel and features a distinctive barbell-style locking mechanism that provides an impenetrable appearance deterring theft. The simple 1/4-turn lock activation allows for quick operation without sacrificing security.
With 2.85 inches of usable pin length, it fits nearly any 2-inch by 2-inch hitch receiver with a 5/8-inch hole. This lock is not compatible with double-walled receiver tubes but offers strong dependability for a wide range of applications, protecting trailer hitches and ball mounts from unauthorized removal.
CZC AUTO 5/8″ Hitch Receiver Lock for Class III/IV
The CZC AUTO Hitch Receiver Lock is designed to fit 2-inch and 2.5-inch Class III and IV tow receivers. Its 5/8-inch solid carbon steel pin is coated with black electrophoretic paint to resist rust and bending. The 360-degree rotating head eases installation, and an all-weather rubber key slot cap protects the keyhole from dust and moisture.
This lock includes an upgraded tubular keyhole with a zinc alloy lock core, offering reliable resistance against tampering. It’s suitable for various towing applications including bike racks, cargo trays, and ball mounts on trucks, RVs, and boats.
TowWorks Extra Long 5/8″ Trailer Hitch Lock
The TowWorks hitch lock features an extra-long 5/8-inch diameter pin with a 4-1/2 inch span, making it ideal for large adjustable hitches and 3-inch receivers. It includes a spring clip (cotter pin) for added safety, which must be inserted during use, and multiple rubber O-rings to reduce rattle and ensure a snug fit across varying hitch tube sizes.
This lock is compatible with many adjustable and channel-style hitches but does not fit Fastway adjustable hitches. Its solid construction ensures reliable theft protection and keeps your towing equipment securely fastened while minimizing noise.
Buying Guide for Choosing the Best Locking Trailer Hitch Pin
Pin Diameter and Receiver Compatibility
Confirm the diameter of your trailer hitch pin hole—commonly 1/2 inch or 5/8 inch—and the receiver size (e.g., 2-inch, 2.5-inch, or 3-inch). Locking pins are often designed to fit specific classes of hitches (Class I through V). Selecting a lock that matches your hitch receiver size is critical for proper security and fit.
Material and Durability
Look for pins made from solid steel, carbon steel, or machine-hardened stainless steel to resist bending, cutting, and corrosion. Weatherproof coatings, paint, or plating and features like rubber caps or keyhole covers protect against rust and environmental damage. These design elements enhance lock longevity outdoors.
Lock Type and Security Features
Locking mechanisms vary, including tubular keys, push-to-lock heads, and cam locking systems. Consider locks with tamper-resistant designs, anti-theft features, and high shear strength steel components. Some locks offer rotating heads for convenient key access and simple locking operations.
Length and Fitment Span
Ensure the length of the locking pin matches the combined width of your hitch receiver and the accessory being secured. Extra-long pins may be necessary for adjustable hitches or wider mounts. Look for additional safety features like spring clips (cotter pins) and rubber O-rings to stabilize the pin and reduce noise.
Ease of Use and Key Management
Choose a lock that balances security with convenient operation. Locks with push-to-lock mechanisms, swivel heads, or quick turn activations simplify the process. If losing keys is a concern, some brands offer replacement keys or keyed-alike options to streamline key management.
Weather Resistance and Maintenance
Locks exposed to the elements require weather sealing. Features like rust-resistant coatings, rubber keyhole caps, and debris protection prevent dust and moisture entry, extending lock life and preventing key jamming. Regular cleaning and lubrication also maintain smooth operation over time.
Brand Reputation and Customer Support
Established brands with strong customer support often provide better quality assurance, warranties, and easy access to replacement parts or keys. Brands like Rhino USA, Master Lock, CURT, and TowWorks have reputations for dependable locking trailer hitch pins.