If you tow a trailer, you know the importance of a secure connection. A locking hitch pin not only keeps your gear safe but also prevents annoying rattles and potential theft. With so many options, finding the right one can be tricky.
This guide reviews five top-rated 5/8-inch locking hitch pins, each with unique features to match different hitches and needs. Whether you need extra length for an adjustable mount or weatherproof protection, you’ll find a reliable pick here.
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JUSTTOP Trailer Hitch Receiver Pin Lock – Universal Fit
Brand: JUSTTOP
A reliable universal locking pin that reduces noise and fits most standard hitches.
The JUSTTOP hitch pin lock is built for versatility. With a 5/8-inch diameter and 3-1/2-inch effective pin length, it fits most Class III and IV hitches with 2-inch or 2-1/2-inch receivers. The black electrophoretic-painted carbon steel resists bending and corrosion, giving you a durable, long-lasting solution. Four integrated anti-rattle rubber O-rings eliminate the annoying noise that often comes with towing, so your ride stays quiet and stable.
Security is a priority here. The high-strength steel construction and theft-deterring design help protect your trailer from unauthorized removal. You can lock it with confidence, knowing the pin is tough enough to handle the load. If you need a straightforward, universal locking pin that reduces rattling and fits common receiver sizes, this JUSTTOP model is a solid choice.
- Fits 2" and 2.5" receivers
- Four anti-rattle O-rings
- Corrosion-resistant finish
- Pin length may be short for adjustable hitches
- Keys are small
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- NIVERSAL COMPATIBILITY:The trailer hitch lock is designed with a 5/8"diameter hitch pin and a length of 3-1/2"of effective pin length,fits most class III IV 2" and 2-1/2" hitch receivers for towing, trailer, boat, RVs, truck, car and tractors
- DURABLE ANTI-THEFT HITCH LOCK:The hitch lock feature black electrophoretic-painted carbon steel, this exceptionally rigid hitch lock resists bending. Security is enhanced by an upgraded tamper-resistant tubular key system with a durable zinc-alloy cylinder, delivering robust anti-theft protection engineered to withstand significant external force.
- DEPENDABLE SECURITY:Engineered with theft-deterring high-strength steel, this locking pin delivers dependable security for your entire trailer hitch assembly
- PREVENT RATTLING NOISE:Eliminate trailer hitch rattling noise with our specialized lock pin—equipped with four integrated rubber O-rings that actively absorb vibrations during towing, preventing disruptive shaking sounds while maintaining secure attachment
- PACKAGE INCLUDED:For convenience, our trailer hitch locks come with two keys. Four integrated rubber o-rings absorb vibration during towing, as well as a 5/8" locking pin and an upgraded push-button latch
TowWorks 79831 Keyed Unique 5/8" Hitch Lock – Extra Long
Brand: TowWorks
An excellent extra-long pin for adjustable hitches, with added safety from the cotter pin.
The TowWorks 79831 is designed for adjustable hitches and channel mounts. Its extra-long 4-1/2-inch span and 5/8-inch diameter make it ideal for CURT-style adjustable hitches and 3-inch receivers. The push-lock design uses two tubular keys for quick locking, and a separate spring clip (cotter pin) adds a layer of safety—you can use the pin with or without the lock engaged. Rubber O-rings keep the pin snug and prevent rattling during transit.
This pin is built for versatility. The extra length ensures it fits through thicker hitch tubes, and the dual-key system gives you a backup. If you have an adjustable hitch or a 3-inch receiver, this TowWorks model offers the reach you need. The added cotter pin provides peace of mind, especially if you prefer a non-locking option for quick disconnects. It’s a practical choice for heavy-duty towing setups.
- Extra-long 4.5-inch span
- Includes cotter pin for safety
- Push-lock with two keys
- Keys are unique, no matching set
- O-rings may wear over time
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- EXTRA LONG PIN FITS MOST ADJUSTABLE HITCHES – Extra long 5/8" diameter locking hitch pin with maximum active length 4-1/2", fits most adjustable hitches, such as fit for CURT channel style adjustable hitches 45900, 45901, 45902 and adjustable pintle hooks 45907, 45908. * This lock DOES NOT fit for FASTWAY adjustable hitches. * Before purchase, please verify all dimensions of your hitch, to get a great fit of the hitch lock pin
- SPRING CLIP (COTTER PIN) PROVIDES ADDITIONAL SAFETY – A separate spring clip (cotter pin) provides additional safety, can use the locking pin with or without the lock mechanism. * Caution: R spring clip (cotter pin) MUST be inserted into pin hole when use this lock
- RUBBER O RINGS KEEP RATTLES DOWN – Rubber O rings prevent any rattling and hold the hitch pin still. * Different brand hitches may have a little different hitch tube size, please adjust O ring quantity or remove O ring to fit the receivers
- PUSH LOCK DESIGN WITH 2 KEYS – 2 tubular keys making it easier to lock and unlock, 1/4 turn lock and push lock design, easy to operate, watertight dust rubber cap prevents locking mechanism internal corrosion
- EACH LOCK KEYED UNIQUE: This item 79831 each lock keyed unique, NOT keyed alike. * Remark: If you need 2 or more than 2 locks keyed alike, please choose 79830 and give the quantity
TowWorks 79852 Keyed Alike 5/8" Hitch Lock Set – Convenient
Brand: TowWorks
A convenient two-pin set with matching keys, ideal for multiple hitches or shared use.
The TowWorks 79852 is a set of two keyed-alike locking pins, each with a 5/8-inch diameter and 4-1/2-inch span. This makes them perfect for adjustable channel mounts and Class III-V hitches. The push-lock design uses four tubular keys (all identical), so you can lock or unlock both pins with the same key—no fumbling for the right one. Rubber O-rings reduce rattling, and a spring clip provides an extra safety measure if you choose not to use the lock.
Having two matching pins is a huge convenience for trailers with multiple attachment points or for sharing between vehicles. The keyed-alike feature simplifies your towing routine, especially if you own several trailers. The extra length fits thicker hitches, and the durable construction handles heavy loads. If you need a pair of locking pins that work together seamlessly, this TowWorks set is a smart investment.
- Two keyed-alike pins included
- Extra-long 4.5-inch span
- Four identical keys provided
- Set is pricier than single pins
- O-rings may need replacement
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- ADJUSTER PIN FITS MOST ADJUSTABLE HITCHES – Extra long 5/8" locking hitch pin with 4-1/2" span, fits most adjustable hitches, such as fit for CURT channel style adjustable hitches 45900, 45901, 45902 and adjustable pintle hooks 45907, 45908. * This lock DOES NOT fit for FASTWAY adjustable hitches. 5/8" receiver pin with 3-1/4" span, fits Class III/IV hitches with 2" and 2-1/2" receivers. * Before purchase, please verify all dimensions of your hitch, to get a great fit of the hitch lock pin
- SPRING CLIP (COTTER PIN) PROVIDES ADDITIONAL SAFETY – A separate spring clip (cotter pin) provides additional safety, can use the locking pin with or without the lock mechanism. * Caution: R spring clip (cotter pin) MUST be inserted into pin hole when use this lock
- RUBBER O RINGS KEEP RATTLES DOWN – Rubber O rings prevent any rattling and hold the hitch pin still. * Different brand hitches may have a little different hitch tube size, please adjust O ring quantity or remove O ring to fit the receivers
- PUSH LOCK DESIGN MAKE EASY TO USE – 4 tubular keyed alike keys making it easier to lock and unlock, 1/4 turn lock and push lock design, easy to operate, watertight dust rubber cap prevents locking mechanism internal corrosion
- 2 LOCKS 4 KEYS KEYED ALIKE: This item 79852 each unit package includes 2 locks with 4 keys all keyed alike.
Rhino USA 3" Trailer Hitch Pin – Weatherproof Design
Brand: Rhino USA
A rugged, weatherproof locking pin perfect for Class V hitches and outdoor use.
The Rhino USA hitch pin is built for Class V hitches with a 3-inch receiver. Its 5/8-inch diameter solid steel construction provides maximum security against theft. The standout feature is the patented slide cap—a weatherproof cover that blocks dirt, mud, and debris from entering the pin mechanism. This keeps your pin clean and ensures long-lasting performance, even in harsh conditions. The tamper-resistant design adds an extra layer of protection.
This pin is American-owned and family-operated, with a focus on quality and customer support. It’s tow-truck ready, meaning it can handle heavy loads without bending. If you tow an RV, boat, or large trailer with a 3-inch hitch, this Rhino USA pin offers peace of mind. The debris-protected cap is a game-changer for off-road or wet environments, keeping your locking mechanism free from grime. It’s a durable, weatherproof choice for serious towers.
- Patented weatherproof slide cap
- Solid steel anti-theft design
- Fits 3-inch Class V hitches
- Only fits 3-inch receivers
- Slide cap may be bulky
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- AMERICAN OWNED, FAMILY OPERATED – Join the Rhino USA Family and Support a Father/Son Business With the Best USA-Based Customer Support.
- ULTIMATE HITCH SECURITY – Anti-Theft Hitch pin Made From Solid Steel for Maximum Security. Protect Your Trailer and Hitch From Theft With a Durable, Tamper-Resistant Design Built for Ultimate Peace of Mind.
- FITS 3 INCH HITCHES – Our Towing Hitch Lock Fits all Class V Hitches (3" x 3") With Ease, Providing a Secure and Reliable Connection for Trailers, RVs, and Other Towing Needs.
- PATENTED SLIDE CAP – Designed With a Weatherproof Cover to Block Dirt, Mud, and Debris, Keeping Your Hitch pin Clean and Ensuring Long-Lasting Durability and Performance.
- REAL LIFETIME REPLACEMENT – All Rhino USA Products Come With a Lifetime Replacement. If you Encounter any Issues, We'll Ensure You're 100% Satisfied With a Replacement or Refund.
TowWorks 79631 Keyed Unique 5/8" Hitch Lock – Standard Fit
Brand: TowWorks
A dependable standard-length locking pin for common receiver sizes, with added safety features.
The TowWorks 79631 is a reliable locking pin for Class III and IV hitches with 2-inch or 2-1/2-inch receivers. It has a 5/8-inch diameter and a 3-1/4-inch span, making it a standard-length option for most towing setups. The push-lock design comes with two tubular keys, and a spring clip (cotter pin) provides an extra safety measure—you can use the pin locked or unlocked. Rubber O-rings prevent rattling, keeping your hitch quiet on the road.
This pin is straightforward and effective. The extra-long span (compared to basic pins) ensures a secure fit through thicker hitch tubes. The cotter pin gives you flexibility if you need to remove the lock quickly. If you have a standard 2-inch or 2.5-inch receiver and want a dependable locking pin with a backup key, this TowWorks model delivers. It’s a no-fuss solution for everyday towing needs.
- Fits 2" and 2.5" receivers
- Includes cotter pin for safety
- Push-lock with two keys
- Shorter span than adjustable models
- Keys are unique, no matching set
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- EXTRA LONG PIN FITS 2" and 2-1/2" RECEIVERS – Extra long 5/8" diameter locking hitch pin with maximum active length 3-1/4", fits Class III/IV hitches with 2" and 2-1/2" receivers. Solid hardened steel tow hitch lock pin with black e-coated on zinc plated finish. * Before purchase, please verify all dimensions of your hitch, to get a great fit of the hitch lock pin
- SPRING CLIP (COTTER PIN) PROVIDES ADDITIONAL SAFETY – A separate spring clip (cotter pin) provides additional safety, can use the locking pin with or without the lock mechanism. * Caution: R spring clip (cotter pin) MUST be inserted into pin hole when use this lock
- RUBBER O RINGS KEEP RATTLES DOWN – Rubber O rings prevent any rattling and hold the hitch pin still. * Different brand hitches may have a little different hitch tube size, please adjust O ring quantity or remove O ring to fit the receivers
- PUSH LOCK DESIGN WITH 2 KEYS – 2 tubular keys making it easier to lock and unlock, 1/4 turn lock and push lock design, easy to operate, watertight dust rubber cap prevents locking mechanism internal corrosion
- EACH LOCK KEYED UNIQUE: This item 79631 each lock keyed unique, NOT keyed alike. * Remark: If you need 2 locks keyed alike, please choose 79632; if you need 3 locks keyed alike, please choose 79633; if you need 4 or more than 4 locks keyed alike, please choose 79630 and give the quantity
Buyer’s Guide: What to Consider
Choosing the right 5/8 locking hitch pin depends on your hitch size, towing needs, and security preferences. Here are key factors to consider before buying.
- Pin Diameter and Length: Ensure the pin diameter matches your hitch hole (5/8 inch is common). The length must extend through the receiver and coupler; measure your setup to avoid a too-short pin.
- Receiver Size Compatibility: Check if your hitch is 2-inch, 2.5-inch, or 3-inch. Some pins are designed for specific sizes, while others are universal with O-rings to fit snugly.
- Locking Mechanism: Push-lock designs are easy to use. Consider keyed-alike sets if you have multiple hitches. A cotter pin adds safety by allowing use without the lock.
- Anti-Rattle Features: Rubber O-rings or gaskets reduce noise and vibration. This is important for a quiet towing experience, especially on long trips or rough roads.
- Weather and Theft Protection: Look for corrosion-resistant finishes and weatherproof caps. Solid steel construction deters theft. A slide cap keeps debris out, extending the pin's life.
Conclusion
Selecting the best 5/8 locking hitch pin comes down to your specific hitch and towing habits. For universal fit and quiet operation, the JUSTTOP pin is a great choice. If you need extra length for adjustable hitches, the TowWorks 79831 or 79852 set are excellent options. For Class V hitches and harsh weather, the Rhino USA pin’s weatherproof cap is unbeatable.
Ultimately, the TowWorks 79631 offers a reliable standard fit for most users. Consider your receiver size, desired security, and whether you need multiple pins. Any of these picks will keep your trailer secure and your towing experience smooth.