Locking Cotter Pin for Trailer Hitches of 2025

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Last Updated - April 24, 2025

Best Choice

1

Kohree
Kohree Trailer Hitch Pin Lock Set, 5/8 Inch Locking Hitch Pin with Keys, Tow Hitch Receiver Pin Lock Set Keyed Alike Trailer Locking Pin for Class III IV Tow RV Trailer Hitch, Anti-Theft & Anti Rattle

9.9 Easy installation

9.9 lasts a long time

9.9 Simple to use

Why we love it

Solid Steel Construction

Watertight Rubber Cap

Perfect Fitments
Main highlights

Key Features
Durable hardened steel construction, unique Zinc Alloy Lock Core, and push-to-lock design ensure security and easy operation.

Ideal Use Cases
Perfect for class III and IV hitch receivers on trailers, ensuring a rattle-free, secure towing experience in all weather conditions.

Customer Praise
Most reviews highlight the product`s robust build, exceptional anti-theft features, and ease of use as its standout qualities.
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9.9

Exceptional

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Value for Money

2

Rhino USA
Rhino USA Trailer Hitch Pin (2 Inch) Patented 5/8" Locking Receiver Hitch Pins for Class III IV Hitches - Weatherproof Anti-Theft Lockable Pin with Debris Protection - Used to Tow Truck, etc - Black

9.9 Durability

9.7 lasts a long time

9.5 Waterproof

Why we love it

Weatherproof design prevents dirt and moisture damage.

Fits most Class III & IV hitches securely.

Highly durable and theft-resistant.
Main highlights

Secure_Weatherproof_Design
Solid forged steel with weatherproof slide cap protects against theft and elements.

Ideal_for_Towing_and_Travel
Perfect for securing trailers, trucks, boats, and bikes during long trips.

Praised_for_Durability_and_Security
Customers appreciate its robust build and ease of use.
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9.8

Exceptional

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3

CZC AUTO
CZC AUTO Hitch Receiver Pin Lock, Trailer Receiver Lock with 5/8" Pin for Class III IV 2" and 2-1/2" Receiver, for Hitch Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat (1 Pack, 5/8 inch pin)

9.5 Easy installation

9.3 worth the money

9.3 Durability

Why we love it

Strong and durable build.

Versatile for various towing needs.

Highly rated for security.
Main highlights

Durable Construction
Made of black electrophoretic painted carbon steel, resists bending.

Versatile Use
Perfect for securing trailers, bikes, and cargo with 2/2-1/2 receivers.

Highly Rated Security
Customers praise its reliability and effective locking mechanism.
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9.7

Exceptional

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4

METOWARE
METOWARE Trailer Tongue Coupler Lock 1/4" Dia, 3-1/2" Span, Trailer Hitch Lock for Latch-Type Coupler, Black Trailer Pin Lock for Towing Trailer RV Car Boat Truck (1 Pack)

9.9 Easy installation

9.7 Simple to use

9.7 lock easily

Why we love it

Secure: Heavy duty steel construction, reinforced zinc alloy lock core, stronger tubular keys.

Convenient: Push to lock design, easy operation.

Protection: Electrophoretic paint, watertight rubber cap rust prevention.
Main highlights

Key Features and Benefits
Heavy-duty steel, 361° rotating waterproof design, push-to-lock, rust protection, and enhanced security with zinc alloy core and stronger keys.

Ideal Use Cases
Perfect for securing trailers during transport over wet or snowy roads, ensuring peace of mind against theft and environmental damage.

Customer Reviews Highlight
Most praised for its easy-to-use push-to-lock feature and exceptional durability against rust and security breaches.
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9.6

Exceptional

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5

MAXXHAUL
MaxxHaul Trailer Tongue Coupler Lock - Adjustable Trailer Tongue Pin, 1/4" Diameter, Fits 1" to 3" Latch-Type Coupler for RV, Truck Towing
Main highlights

Suitable use for 1" to 3-1/16" latch-type couplers for towing, boat, truck, and RV
Includes diameter 1/4" locking pin, 360º rotating lock head all-weather rubber cap, and 2 flat keys for maximum security to help tighten in place
Easy to operate with a user-friendly push-to-lock design without using the key
Constructed from high-strength steel with chrome finish to resist rust and corrosion and handle all types of weather conditions
Adjustable with 4 different active lengths: 1", 1-11/16", 2-3/8", and 3-1/16"
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9.5

Excellent

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6

Master Lock
Master Lock Receiver Lock, 1/2 in. and 5/8 in. Swivel Head, Weather Resistant Trailer Coupler Locking Hitch Pin with Keys for Protecting Trailers, RVs, 2866DAT

9.7 lasts a long time

9.5 Simple to use

8.2 Security

Why we love it

Enhanced security with durable, weather-resistant receiver lock.

Versatile fit with two pin sizes for different hitches.

Easy-to-use, 360-degree rotating locking head.
Main highlights

Receiver Lock Security
Receiver lock provides added security and theft deterrence while towing. Fits specific vehicle types. Rated up to 10,000 lbs for Class III and IV hitches.

Versatile Use Cases
Ideal for securing bike racks, cargo platforms, and other hitch-mounted accessories. Includes two pin sizes for compatibility with various hitch receiver tubes.

Durability and Weather Resistance
Customers praise its sturdy construction and weather-resistant features, including a rubber cover that protects the lock from dirt and moisture.
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9.2

Excellent

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7

CZC AUTO
CZC AUTO Hitch Receiver Pin Lock, Right Angle 1/2" and 5/8" Dual Pins for Class I II III IV 1-1/4" 2" and 2-1/2" Receiver, Compatible with Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat

9.5 worth the money

9.5 Simple to use

9.5 lock easily

Why we love it

1. Durable: Carbon steel construction resists bending.

2. Convenient: Push to lock, no keys needed.

3. Compatible: Fits most trailer hitches.
Main highlights

Key Features and Benefits
Dual pins fit most tow receivers, easy push-to-lock design, and made from durable chrome-plated carbon steel for towing safety.

Ideal Use Cases
Perfect for Class I/II/III/IV receivers on trailers, trucks, RVs, cars, boats with hitch racks, cargo trays, bike racks, and tow ropes.

Customer Reviews Highlight
Most praised for its easy installation and strong, secure locking mechanism that gives users peace of mind while towing.
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8.9

Very Good

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8

Master Lock
Master Lock Trailer Hitch Pin, Stainless Steel Barrel Head Hitch Pin, Fits Standard 5/8-inch Receivers, 1465DAT
Main highlights

Usable length of hitch pin is 3 in.; Stainless steel hitch pin fits 5/8 in. trailer receivers
Tapered ends offer easy insertion
Includes one hitch pin
Hitch pin is made with stainless steel for rugged durability and corrosion protection
Best used for vehicles, trailers and RV hitches
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8.7

Very Good

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9

TowWorks
TowWorks 79631 Keyed Unique 5/8" Trailer Hitch Lock with Extra Long 3-1/4" Span, Double Safety Tow Hitch Receiver Locking Pin for Class III IV Hitches with 2" and 2.5" Receivers

9.7 Durability

9.3 Security

8.2 Simple to use

Why we love it

Fits multiple hitch sizes securely.

Extra safety with spring clip cotter pin.

Reduces rattling with rubber O-rings.
Main highlights

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
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
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
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8.4

Good

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10

METOWARE
METOWARE Trailer Hitch Lock Hitch Receiver Pin Lock Fits Class III IV V and 2”- 3-1/2" Receiver with 5/8" Dia 4” Lock Pin and 8 Anti-Rattle Rubber O-Rings Receiver Hitch Lock (1 Pack)

9.3 Lock Feature

9.3 lock easily

8.9 Simple to use

Why we love it

Heavy duty metal construction

Universal compatibility

Safe easy to use
Main highlights

Key Features
All-metal construction, universal compatibility, withstands up to 30,000 lbs, includes anti-theft zinc alloy core and noise-preventing rubber elements.

Ideal Use Cases
Perfect for securing class III, IV, V hitch receivers on big towing trucks and cars in high-risk theft areas.

Customer Praise
Most reviews highlight its robust build and the peace of mind provided by the anti-theft features and durability.
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8.3

Good

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Locking Cotter Pin for Trailer Hitches of 2025

1

Kohree Trailer Hitch Pin Lock Set, 5/8 Inch Locking Hitch Pin with Keys, Tow Hitch Receiver Pin Lock Set Keyed Alike Trailer Locking Pin for Class III IV Tow RV Trailer Hitch, Anti-Theft & Anti Rattle

Why we love it

2

Rhino USA Trailer Hitch Pin (2 Inch) Patented 5/8" Locking Receiver Hitch Pins for Class III IV Hitches - Weatherproof Anti-Theft Lockable Pin with Debris Protection - Used to Tow Truck, etc - Black

Why we love it

3

CZC AUTO Hitch Receiver Pin Lock, Trailer Receiver Lock with 5/8" Pin for Class III IV 2" and 2-1/2" Receiver, for Hitch Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat (1 Pack, 5/8 inch pin)

Why we love it

4

METOWARE Trailer Tongue Coupler Lock 1/4" Dia, 3-1/2" Span, Trailer Hitch Lock for Latch-Type Coupler, Black Trailer Pin Lock for Towing Trailer RV Car Boat Truck (1 Pack)

Why we love it

5

MaxxHaul Trailer Tongue Coupler Lock - Adjustable Trailer Tongue Pin, 1/4" Diameter, Fits 1" to 3" Latch-Type Coupler for RV, Truck Towing

6

Master Lock Receiver Lock, 1/2 in. and 5/8 in. Swivel Head, Weather Resistant Trailer Coupler Locking Hitch Pin with Keys for Protecting Trailers, RVs, 2866DAT

Why we love it

7

CZC AUTO Hitch Receiver Pin Lock, Right Angle 1/2" and 5/8" Dual Pins for Class I II III IV 1-1/4" 2" and 2-1/2" Receiver, Compatible with Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat

Why we love it

8

Master Lock Trailer Hitch Pin, Stainless Steel Barrel Head Hitch Pin, Fits Standard 5/8-inch Receivers, 1465DAT

9

TowWorks 79631 Keyed Unique 5/8" Trailer Hitch Lock with Extra Long 3-1/4" Span, Double Safety Tow Hitch Receiver Locking Pin for Class III IV Hitches with 2" and 2.5" Receivers

Why we love it

10

METOWARE Trailer Hitch Lock Hitch Receiver Pin Lock Fits Class III IV V and 2”- 3-1/2" Receiver with 5/8" Dia 4” Lock Pin and 8 Anti-Rattle Rubber O-Rings Receiver Hitch Lock (1 Pack)

Why we love it

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