A quality trailer lock helps deter opportunistic theft without adding much cost or complexity to your towing setup. The best options under $50 include adjustable coupler locks, receiver pin locks, and keyed-alike sets for different trailer configurations.
We compare 10 budget-friendly trailer hitch locks based on fit, construction, locking design, usability, and everyday value so you can choose the right match for your trailer and vehicle.
Best 10 Trailer Hitch Locks Under 50 Picks for 2026
Best Universal Coupler Lock
- Fits three common coupler sizes
- Resists picking and prying
- Limited lifetime warranty
Best For: Owners seeking a recognizable, broadly compatible keyed coupler lock
Best Adjustable Ratchet Lock
METOWARE Heavy-Duty Coupler Lock
- Eleven adjustable locking positions
- Fits three common coupler sizes
- Rubber cap helps block dust and water
Best For: Users prioritizing quick adjustment and covered weather protection
Best Complete Security Kit
- Includes four trailer security components
- All locks use the same keys
- Fits common coupler sizes
Best For: Owners wanting broader trailer security from one keyed-alike kit
Best High-Visibility Lock
- Bright yellow theft-deterrent finish
- Eleven adjustable ratchet positions
- Rubber caps protect against debris
Best For: Outdoor trailer storage where visibility and weather protection matter
Best Anti-Rattle Pick
JUSTTOP 5/8-Inch Hitch Pin Lock
- Fits most 2-inch and 2-1/2-inch Class III and IV receivers
- Four rubber O-rings help reduce towing rattle
- Includes two keys and a tubular key system
Best For: Receiver setups where compatibility and quieter towing matter
Best Established Brand
Master Lock Universal Coupler Lock
- Fits three common trailer coupler sizes
- Zinc construction resists rust and corrosion
- Includes two keys and a one-year warranty
Best For: Common RV, boat, camper, and utility trailer couplers
Best Adjustable Fit
RETRUE Yellow Universal Coupler Lock
- Offers 11 locking positions for three coupler sizes
- Bright yellow finish improves visibility
- Includes two keys and a 120-day quality warranty
Best For: Multiple trailer couplers and highly visible outdoor security
Best with Extra Features
METOWARE 2-Inch Receiver Hitch Lock
- 5/8-inch high-strength steel pin
- Four O-rings help reduce rattling
- Weather cover and two keys included
Best For: 2-inch receiver owners who want anti-rattle support
Best Stainless-Steel Coupler Lock
Master Lock 2847DAT Adjustable Coupler Lock
- Six locking positions
- Fits latches up to 2-3/4 inches
- Includes two keys and weather seal
Best For: Compatible trailer and RV couplers needing adjustability
Best Universal Coupler Fit
Turnart Adjustable Trailer Lock
- 11 locking positions for three coupler sizes
- Bright yellow visible finish
- Three keys and watertight dust cap included
Best For: Owners wanting adjustable, highly visible coupler security
Best Universal Coupler Lock – Master Lock Trailer Lock
For shoppers comparing trailer hitch locks under 50, this Master Lock model is a straightforward universal coupler lock for common 1-7/8-inch, 2-inch, and 2-5/16-inch trailer couplers. Its bright red painted finish adds visibility, while the rekeyable locking mechanism is designed to resist picking and prying.
Best For: Trailer owners who want one lock for multiple common coupler sizes, including boat, RV, utility, and camper trailers.
Pros:
- Fits 1-7/8-inch, 2-inch, and 2-5/16-inch couplers.
- Advanced mechanism resists picking and prying.
- Bright red finish helps discourage tampering and resists rust and corrosion.
- Backed by a limited lifetime manufacturer warranty.
Cons:
- Uses a traditional key rather than a combination or keyless system.
- Its painted alloy-steel finish may show wear over time.
This is a practical, recognizable option when you want broad coupler compatibility and a simple keyed design. The rekeyable cylinder and limited lifetime warranty add useful long-term appeal.
Best Adjustable Ratchet Lock – METOWARE Heavy-Duty Coupler Lock
This METOWARE adjustable coupler lock is a strong contender among trailer hitch locks under 50 for shoppers who value quick fit adjustment. Its ratchet design provides 11 locking positions across three common coupler sizes, while the aluminum-and-iron construction is intended for durable, weather-resistant use.
Best For: Trailer owners who want a highly adjustable coupler lock with a covered lock core for protection from dust and water.
Pros:
- Fits 1-7/8-inch, 2-inch, and 2-5/16-inch couplers.
- Eleven ratchet locking positions make installation and removal convenient.
- Combines an aluminum body with heavy-duty iron construction.
- Includes an all-weather rubber cap and two keys.
Cons:
- Warranty coverage is listed as 30 days.
- It is a coupler lock rather than a multi-lock security kit.
The adjustable ratchet is the standout feature here, making this a convenient choice for trailers with different coupler dimensions. The rubber cap is also useful for keeping the locking area shielded from everyday exposure.
Best Complete Security Kit – RETRUE Keyed Alike Lock Set
Among trailer hitch locks under 50, the RETRUE set stands out by covering more than the coupler alone. It includes a universal coupler lock, two hitch receiver pin locks, and a tongue lock, with all three locks keyed alike for simpler day-to-day use.
Best For: RV, trailer, and boat owners who want one keyed-alike kit for coupler, receiver, and trailer tongue security.
Pros:
- Includes a coupler lock, two receiver pin locks, and a tongue lock.
- Three locks use the same keys, with four keyed-alike keys included.
- Coupler lock fits 1-7/8-inch, 2-inch, and 2-5/16-inch couplers.
- Aluminum and A36 steel construction is described as rustproof and weatherproof.
Cons:
- The multi-piece kit has more components to keep track of than a single lock.
- Receiver pins and tongue lock have specific diameter and span limits.
If you need coverage for several trailer connection points, this kit offers more equipment than a basic coupler lock. The keyed-alike setup can also reduce the hassle of carrying separate keys.
Best High-Visibility Lock – METOWARE Yellow Coupler Lock
This yellow METOWARE coupler lock is a practical pick among trailer hitch locks under 50 when visibility matters. It uses an all-metal construction, an 11-position adjustable ratchet, and a covered locking mechanism designed for protection against rain, snow, dirt, and debris.
Best For: Trailer owners who want a highly visible, adjustable lock for common coupler sizes and outdoor storage.
Pros:
- Fits 1-7/8-inch, 2-inch, and 2-5/16-inch couplers.
- Eleven ratchet positions support quick adjustment and removal.
- Bright yellow finish provides a visible theft deterrent.
- Rubber caps and zinc plating help protect against weather and corrosion.
Cons:
- The supplied notes do not specify the number of included keys.
- It secures the coupler but does not include receiver or tongue locks.
The conspicuous yellow finish makes this model easy to spot and may discourage casual tampering. Its broad fit range and weather-focused design make it well suited to trailers stored outdoors.
Best Anti-Rattle Pick – JUSTTOP 5/8-Inch Hitch Pin Lock
For shoppers comparing trailer hitch locks under 50, the JUSTTOP receiver pin lock is a practical choice for Class III and IV receivers. Its 5/8-inch pin fits 2-inch and 2-1/2-inch receivers, while four rubber O-rings help reduce towing rattle.
Best For: Towing setups where receiver compatibility and reduced rattling are priorities.
Pros:
- Fits most 2-inch and 2-1/2-inch Class III and IV receivers.
- Black electrophoretic-painted carbon steel construction is designed to resist bending.
- Four rubber O-rings help absorb vibration and reduce rattling noise.
- Includes two keys and a tamper-resistant tubular key system.
Cons:
- The 3-1/2-inch effective pin length may not suit every receiver and accessory combination.
- This is a receiver pin lock, rather than a coupler lock for securing an unattached trailer.
Choose this model if you want a receiver lock with built-in anti-rattle features and broad compatibility across common Class III and IV towing applications.
Best Established Brand – Master Lock Universal Coupler Lock
Among trailer hitch locks under 50, the Master Lock 379ATPY stands out as a versatile coupler lock for parked trailers and towing equipment. It fits several common coupler sizes and uses a zinc body designed to resist rust and corrosion.
Best For: RVs, campers, boat trailers, and utility trailers using common coupler sizes.
Pros:
- Fits 1-7/8-inch, 2-inch, and most 2-5/16-inch trailer couplers.
- Zinc construction offers rust and corrosion resistance for outdoor use.
- Designed to deter unauthorized coupling and resist picking and prying.
- Includes two keys and a one-year manufacturer warranty.
Cons:
- It is intended for trailer couplers, not receiver hitch pin locking.
- Its universal fit is specified for most, rather than all, 2-5/16-inch couplers.
The Master Lock is a sensible option for buyers who need one keyed coupler lock for multiple common trailer sizes and prefer a corrosion-resistant design from an established brand.
Best Adjustable Fit – RETRUE Yellow Universal Coupler Lock
For shoppers seeking trailer hitch locks under 50 with an adjustable fit, the RETRUE Universal Trailer Coupler Hitch Lock offers 11 locking positions. Its bright yellow finish also makes the lock easy to spot on a parked trailer.
Best For: Owners who want one adjustable coupler lock for multiple common coupler sizes.
Pros:
- Adjusts across 11 locking positions for 1-7/8-inch, 2-inch, and 2-5/16-inch couplers.
- High-strength A36 steel construction is designed for cut and shear resistance.
- Rustproof and weatherproof design suits outdoor trailer storage.
- Includes two keys, a bright yellow finish, and a 120-day quality warranty.
Cons:
- At 1.53 pounds, it is heavier than some simpler receiver pin locks.
- The aluminum body and yellow finish may not appeal to shoppers seeking a subdued appearance.
This RETRUE model is a strong fit when adjustability and visibility are more important than a low-profile look, especially for owners with trailers using different coupler sizes.
Best with Extra Features – METOWARE 2-Inch Receiver Hitch Lock
For shoppers comparing trailer hitch locks under 50, the METOWARE is a practical choice for a standard 2-inch receiver. Its 5/8-inch steel pin, weather protection, and included O-rings focus on everyday security and reduced hitch movement.
Best For: Owners of 2-inch receivers who want anti-rattle features and weather-resistant key protection.
Pros:
- High-strength steel construction helps deter theft.
- Four rubber O-rings help reduce rattling and towing noise.
- Water- and dust-resistant cover protects the keyhole.
- Includes two copper keys with non-slip protection.
Cons:
- Not compatible with double-walled receiver tubes.
- Designed for 2-inch by 2-inch receivers rather than multiple receiver sizes.
Check your receiver construction before buying, especially if it is double-walled. If it fits, the METOWARE combines basic security with a useful anti-rattle design.
Best Stainless-Steel Coupler Lock – Master Lock 2847DAT Adjustable Coupler Lock
Among trailer hitch locks under 50, the Master Lock 2847DAT stands out as an adjustable coupler lock with stainless steel components. Its six locking positions accommodate coupler latch widths up to 2-3/4 inches.
Best For: Trailer, RV, and towing-gear owners who need an adjustable coupler lock with corrosion-resistant components.
Pros:
- Stainless steel components provide corrosion resistance.
- Six locking positions fit coupler latch widths up to 2-3/4 inches.
- Weather-touch seal helps protect the keyway and shaft from dirt and moisture.
- Includes two keys and an ergonomically designed shaft end.
Cons:
- This is a coupler lock, not a receiver-style hitch pin lock.
- Fit depends on the coupler latch width.
The adjustable design makes this a flexible option for compatible couplers, while the stainless steel components and weather seal support regular outdoor use. Confirm your coupler dimensions before ordering.
Best Universal Coupler Fit – Turnart Adjustable Trailer Lock
For buyers seeking trailer hitch locks under 50 with broad coupler compatibility, the Turnart uses an 11-position ratchet design. It fits 1-7/8-inch, 2-inch, and 2-5/16-inch couplers and adds a highly visible yellow finish.
Best For: Trailer owners who use common coupler sizes and want a visible, adjustable theft-deterrent lock.
Pros:
- Fits three common coupler sizes with 11 locking positions.
- Bright yellow color makes the lock easy to spot.
- Aluminum body and high-strength steel construction resist cutting and shearing.
- Includes a watertight dust cap and three keys.
Cons:
- At 1.98 pounds, it is heavier than the other listed options.
- Its fit is limited to the listed coupler sizes.
The Turnart is a strong choice when adjustability and visibility matter. Verify that your coupler is 1-7/8, 2, or 2-5/16 inches, then use the ratchet positions to establish a secure fit.
How We Picked the Best Trailer Hitch Locks Under 50
We focused on locks priced below $50 that cover the most common towing needs: securing an unattended trailer, preventing hitch removal, or adding protection at the coupler. The selection includes adjustable universal coupler locks, locks designed for specific coupler sizes, receiver pin locks for 2-inch and 2.5-inch receivers, and keyed-alike sets.
Our comparison emphasizes practical details rather than appearance alone. We considered construction materials, shackle or pin dimensions, adjustment range, resistance to casual tampering, weather exposure, included keys, and how easily each lock can be installed or removed. Always verify the current price and specifications before ordering, as listings and availability can change.
Quick Comparison
| Lock type | Best for | What to check |
|---|---|---|
| Adjustable coupler lock | Securing a trailer while parked | Coupler shape and adjustment range |
| Fixed-size coupler lock | Common 1-7/8-inch, 2-inch, or 2-5/16-inch couplers | Exact coupler compatibility |
| Receiver pin lock | Preventing hitch accessories or drawbars from being removed | Receiver diameter and usable pin length |
| Keyed-alike set | Managing multiple locks with one key | Whether all included cylinders use the same key |
Key Buying Factors for Trailer Hitch Locks Under $50
Choose the Correct Lock Type
A coupler lock blocks the trailer tongue from being connected to a vehicle or prevents the coupler latch from being opened. A receiver pin lock secures the insert inside the vehicle’s hitch receiver. These serve different purposes, and one may not replace the other.
Confirm Fit Before Buying
Measure the coupler opening or check the trailer manufacturer’s size specification. Common coupler sizes include 1-7/8 inches, 2 inches, and 2-5/16 inches. For receiver locks, confirm the pin diameter, receiver class, and whether the stated length clears the hitch and locking head.
Prioritize Weather-Ready Construction
Look for hardened steel or stainless-steel components, protective finishes, and a sealed or covered keyway. No budget lock is completely maintenance-free, so occasional cleaning and a suitable lock lubricant can help prevent sticking and corrosion.
Consider Daily Convenience
An adjustable lock offers broader compatibility, while a dedicated-size model may be simpler and more compact. A visible lock head, easy-grip body, and included spare keys can make regular use less frustrating.
Who Should Buy Which Trailer Hitch Locks Under 50?
Choose an adjustable coupler lock if you use multiple trailers or are unsure which tongue geometry will be the best match. Pick a fixed-size coupler lock when you know your trailer’s coupler dimensions and want a straightforward fit. A receiver pin lock is the right choice for protecting a removable ball mount, cargo carrier, or other hitch accessory. If you need protection at both connection points, combine a coupler lock with a receiver lock, provided both fit your equipment.
For owners managing several locks, a keyed-alike set can reduce key clutter. Whichever model you choose, treat it as a theft deterrent rather than an absolute guarantee: park in visible, well-lit areas, remove valuable equipment when possible, and inspect the lock regularly for wear or corrosion.