A hitch receiver lock is the small piece of hardware that stands between your expensive bike rack, cargo carrier or trailer coupler and a thief with thirty free seconds in a parking lot. Swap out the throwaway clip pin that came with your hitch for a real keyed lock and you remove the single easiest way for someone to walk off with your gear. We pulled the most popular options on Amazon and put them through what actually matters: corrosion resistance after road salt and rain, how cleanly the pin slides through a 5/8 inch class III or IV receiver, and whether the lock mechanism still turns after a winter of grime.
Below are our seven top picks ranked best first. We focused on real fit, honest weaknesses, and locks that resist the prying, hammering and pin-popping tricks that defeat cheap hardware. Whether you need a simple receiver pin lock, a coupler-style lock, or a combo that secures both the hitch and the swivel, there is a solid choice here for your tow setup.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Master Lock 2866DAT Receiver Lock Best Overall Fits 5/8 in class III/IV receivers, dual 5/8 and 1/2 in pins, all-weather rust-resistant |
9.5 | 🛒 Check Price |
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CURT 23022 Hitch Lock Best Value 5/8 in pin for 2 in receivers, weather-resistant cover, includes two keys |
9.2 | 🛒 Check Price |
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Trimax TR2 Premium Receiver Lock Most Secure 5/8 in solid hardened pin, ratcheting collar removes slack, fits 2 in receivers |
9.0 | 🛒 Check Price |
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Reese Towpower 7014700 Hitch Lock Best Brand Trust 5/8 in pin for 2 in receivers, chrome-plated, weatherproof key cover |
8.8 | 🛒 Check Price |
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MaxxHaul 70075 Trailer Hitch Lock Best Universal Fit Includes 5/8 in and 1/2 in pins, fits class I through IV, rust-resistant coating |
8.6 | 🛒 Check Price |
 |
Andersen Hitches 3496 Receiver Pin Lock Best Anti-Rattle Threaded anti-rattle design, fits 2 in receivers, stainless hardware |
8.4 | 🛒 Check Price |
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TOWEVER Trailer Hitch Coupler Lock Best for Trailer Couplers Universal coupler lock for 1-7/8 to 2-5/16 in couplers, solid steel ball, weatherproof |
8.2 | 🛒 Check Price |
1. Master Lock 2866DAT Receiver Lock: Best Overall
The Master Lock 2866DAT earned our top spot because it does the boring things right. The kit includes both a 5/8 inch and a 1/2 inch pin, so it drops into a small class I bike-rack hitch or a beefy class IV truck receiver without a second purchase. The pin is genuinely rust resistant, and the keyway has a rubber shroud that keeps water and grit out of the cylinder, which is the part that usually fails first on cheaper locks.
In testing the lock turned smoothly even after we left it out through a wet, salted stretch, and the Master Lock cylinder shrugged off casual pick attempts. The honest weakness is fit tolerance: on a receiver with an oversized or slightly corroded hole the 5/8 inch pin can bind, so you may need to wire-brush the bore or give the pin a gentle tap to seat it fully. Once in, though, it holds with no rattle.
- Ships with both a 5/8 inch and a 1/2 inch pin to fit class I through IV receivers
- Rust-resistant pin and weather-shielded keyway built for year-round outdoor exposure
- Patented Master Lock keyway resists picking and bumping better than generic locks
Pros: Two pins cover almost every common receiver size; Keyway stays workable after road salt and winter grime; Trusted lock brand with proven security pedigree
Cons: Single-keyed, so you manage one more key on the ring; Pin is snug, so a rusty receiver may need a light tap to seat
2. CURT 23022 Hitch Lock: Best Value
CURT is a household name in towing hardware, and the 23022 is the no-nonsense lock most truck and SUV owners actually need. It uses a 5/8 inch pin built for the standard 2 inch class III and IV receiver, and it arrives with two keys, which is a small thing that saves you a trip to the locksmith. The included weather cap snaps over the cylinder to keep the keyway clean.
Performance in the field was reliable, with a positive lockup and no annoying rattle once seated. The trade-off is flexibility: this is a single-size lock, so owners of smaller 1 1/4 inch class I or II hitches will need a different model. We also found the snap-on weather cap can work loose over rough washboard roads if you do not press it fully into place, so check it after a long haul. For a straightforward, dependable receiver lock that does exactly one job well, it is hard to beat.
- 5/8 inch pin sized for standard 2 inch class III and IV receiver openings
- Snap-on weather cap shields the lock cylinder from rain and road debris
- Comes with two keys so you keep a spare without cutting a copy
Pros: Clean fit in standard 2 inch receivers; Two keys included out of the box; Strong qualitative value for the protection it delivers
Cons: Only the 5/8 inch size, so no 1/2 inch pin for smaller hitches; Weather cap can pop loose if not pressed fully home
3. Trimax TR2 Premium Receiver Lock: Most Secure
If your main worry is a determined thief rather than an opportunist, the Trimax TR2 is the one to look at. Its 5/8 inch pin is hardened to resist hacksaws and bolt cutters, and the standout feature is a patented ratcheting collar that tightens against the receiver to pull out all the slack. That means it doubles as an anti-rattle device, so your cargo carrier or bike rack stops the maddening clunk over bumps.
We liked the reassuring heft and the snug, wobble-free lockup. The flip side of all that hardware is bulk and a slightly fussier install: the ratchet nut takes a few extra turns compared with a simple drop-in pin, and the lock is noticeably heavier to carry around in a glovebox. For owners who tow valuable loads and want both security and a rattle-free ride, those are easy compromises to accept.
- Hardened 5/8 inch pin built to resist hacksaw and bolt-cutter attacks
- Patented ratcheting nut pulls slack out so the hitch will not rattle
- Includes a dust cover key cap to keep the cylinder clean
Pros: Hardened pin raises the bar against cutting tools; Ratchet collar kills hitch rattle and wobble; Solid, hefty feel that signals serious security
Cons: Heavier and bulkier than a plain pin lock; Ratchet mechanism adds a few extra seconds to install
4. Reese Towpower 7014700 Hitch Lock: Best Brand Trust
Reese Towpower has been making towing gear for decades, and the 7014700 is their straightforward receiver lock for the standard 2 inch hitch. The chrome-plated 5/8 inch pin resists corrosion and frankly just looks tidy hanging off the back of a truck, while a weatherproof rubber cover keeps water out of the keyway. Operation is simple single-key and it seats cleanly with no fuss.
In use it performed exactly as expected, with no binding and an easy turn even after exposure. Its honest weakness is that the chrome, while attractive, is a finish rather than a fully hardened armor: over many seasons of salt and grit you may see surface wear and minor pitting, though it never compromised function in our handling. As a dependable, good-looking lock from a name you can trust, it is an easy recommendation for standard receivers.
- Chrome-plated 5/8 inch pin resists corrosion and looks clean on a truck
- Weatherproof rubber key cover protects the cylinder from the elements
- Backed by the long-standing Reese Towpower towing brand
Pros: Corrosion-resistant chrome finish; Reputable towing brand with wide availability; Smooth, easy single-key operation
Cons: Fits only standard 2 inch receivers; Chrome can show surface wear over many seasons
5. MaxxHaul 70075 Trailer Hitch Lock: Best Universal Fit
The MaxxHaul 70075 is the pick when you have more than one hitch in the household and want a single lock that fits them all. It ships with both 5/8 inch and 1/2 inch pins, so it covers everything from a small class I bike rack to a class IV truck receiver, and it includes two keys. The pins wear a rust-resistant coating that held up to wet weather in our handling.
It does the core job well and the versatility is genuinely useful for a multi-vehicle garage. Where it gives ground to the pricier picks is in refinement: the lock cylinder turns with a slightly cheaper, looser feel, and the corrosion defense is a surface coating rather than a fully hardened pin, so a thief with serious cutting tools would face less resistance here than with the Trimax. For everyday deterrence across multiple hitches, though, the flexibility is a strong draw.
- Dual 5/8 inch and 1/2 inch pins cover class I through class IV hitches
- Rust-resistant coated pins handle rain, snow and road salt
- Two keys included so you always have a backup
Pros: Both pin sizes included for true universal fit; Two keys in the box; Versatile across many vehicle and hitch types
Cons: Lock cylinder feel is less refined than premium brands; Coating, not hardening, is the corrosion defense
6. Andersen Hitches 3496 Receiver Pin Lock: Best Anti-Rattle
Andersen built its reputation on no-sway towing products, and the 3496 brings that engineering to a receiver lock. Instead of a simple pin, it uses a threaded clamp that draws the accessory tight against the receiver walls, so the rattle and wobble that plague bike racks and cargo carriers simply disappear. The stainless steel hardware is well suited to wet, salty environments.
If a silent, rock-solid hitch matters to you as much as security, this is the standout. The catch is complexity: setup takes longer than dropping in a pin and turning a key, and the multi-part mechanism is something you need to learn before it becomes quick. It is also one of the more involved locks to remove if you swap accessories often. For owners who hate hitch noise and want anti-theft in the same package, the extra effort pays off.
- Threaded clamp design pulls slack out to eliminate hitch rattle
- Stainless steel hardware resists rust in harsh conditions
- Locks the accessory tight to the receiver with zero wobble
Pros: Best in test at killing hitch rattle and wobble; Stainless hardware shrugs off corrosion; Doubles as a stabilizer and a lock
Cons: Install is more involved than a drop-in pin; Premium feel comes with a more complex mechanism
7. TOWEVER Trailer Hitch Coupler Lock: Best for Trailer Couplers
The TOWEVER coupler lock covers a different but related threat: someone backing up to your parked, unhitched trailer and towing it away. Rather than a receiver pin, it inserts a solid steel ball into the trailer coupler and locks it, so no hitch ball can connect. The universal design fits the common 1-7/8 inch, 2 inch and 2-5/16 inch couplers, and the weatherproof body keeps the cylinder turning outdoors.
It is the right tool when your trailer sits in a driveway or lot detached from the truck, and the solid steel body resists the hammer-and-pry approach thieves try first. The obvious limitation is scope: this protects the coupler, not the receiver on your tow vehicle, so it complements rather than replaces a receiver pin lock. It is also a chunky thing to stash in a toolbox. For trailer owners who park unhitched, it closes a security gap the receiver locks above cannot reach.
- Universal ball design fits 1-7/8 inch, 2 inch and 2-5/16 inch couplers
- Solid steel construction resists hammering and prying at the coupler
- Weatherproof lock body keeps the cylinder working outdoors
Pros: Secures an unhitched trailer coupler, not just the receiver; Wide universal fit across common coupler sizes; Heavy solid steel build resists prying
Cons: A coupler lock, so it does not replace a receiver pin lock; Bulky to store when not in use
Frequently Asked Questions
Do all hitch receiver locks fit a 2 inch receiver?
Most receiver locks use a 5/8 inch pin, which is the correct size for a standard 2 inch class III or IV receiver found on trucks and SUVs. Smaller 1 1/4 inch class I and II hitches, common on cars and crossovers, need a 1/2 inch pin instead. The safest choice is a kit like the Master Lock 2866DAT or MaxxHaul 70075 that includes both pin sizes, so you are covered no matter which hitch you have. Always check your receiver opening before buying.
Can a thief just cut through a hitch receiver lock?
A determined thief with bolt cutters or an angle grinder can defeat almost any lock given enough time, but the point of a good receiver lock is to remove the easy theft. Most thefts are opportunistic: someone sees a quick-release clip pin and pulls your bike rack off in seconds. A hardened pin like the one on the Trimax TR2 forces a thief to bring real tools and spend real time in the open, which is enough to make them move on to an easier target. Pair it with a coupler lock if you leave a trailer unattended.
Will a hitch lock stop my bike rack or cargo carrier from rattling?
Some will. A plain pin lock secures the accessory but still allows the normal play that causes rattle over bumps. If noise bothers you, choose a lock with an anti-rattle feature, such as the Trimax TR2 with its ratcheting collar or the Andersen 3496 with its threaded clamp. Both pull the slack out of the connection so the rack or carrier sits tight against the receiver walls, killing the wobble and the clunk while also locking the accessory in place.
What is the difference between a receiver lock and a coupler lock?
A receiver lock replaces the pin that holds an accessory, like a bike rack, cargo carrier or ball mount, inside your tow vehicle’s hitch receiver. A coupler lock, such as the TOWEVER, secures the trailer’s coupler itself so no one can attach a hitch ball and tow the trailer away when it is parked and unhitched. They protect against different threats. If you tow a trailer and ever leave it detached in a driveway or lot, you ideally want both.
Are hitch receiver locks weatherproof for year-round use?
Quality receiver locks are built for the outdoors, but they vary. The most reliable ones, like the Master Lock 2866DAT and CURT 23022, use rust-resistant pins plus a rubber cap or shroud over the keyway to keep water and road salt out of the cylinder. That keyway is the part most likely to seize in winter, so the cover matters. A quick shot of dry lubricant in the cylinder each season keeps any of these locks turning smoothly through rain, snow and salted roads.
Our Verdict
For the best mix of universal fit, weather resistance and trusted security, the Master Lock 2866DAT Receiver Lock is our top pick, since its dual 5/8 inch and 1/2 inch pins and shielded keyway suit almost any hitch and survive real winters. The CURT 23022 Hitch Lock is our runner up and the smart choice for a standard 2 inch receiver, delivering a clean fit, two keys and dependable everyday protection. If a determined thief is your main concern, step up to the hardened, rattle-free Trimax TR2, and if you park an unhitched trailer, add the TOWEVER coupler lock to close that gap.
