Top 8 Trailer Coupler Lock – Towing Hitch Locks

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1. Master Lock

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2", and 2-5/16" Couplers, Trailer Locks #389DAT, Master Lock, Universal Size Fits 1-7/8"

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Master Lock #ad - Advanced locking mechanism resists picking and prying. The similar 379KA coupler locks are available keyed alike. Universal coupler lock fits virtually all 1-7/8", 2", and 2-5/16" trailer couplers. Simple installation and removal. This lock protects unattended trailers and guards against tow-away theft. The only difference between this one 389DAT and the 379KA is the color. Resists rust and corrosion. We can not key two 2 of these locks the same. The bright red finish discourages thiefs from messing with your trailer.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height7.5 Inches
Length6.5 Inches
Weight1 Pounds
Width4 Inches
Part Number389DAT
Model389DAT
WarrantyMASTER LOCK PRODUCT WARRANTY Limited Lifetime Warranty Master Lock Company LLC (“Master Lock”) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlock.com or 1.800.464.2088 for instructions on obtaining repair or replacement.

2. CURT

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1/4-Inch Pin Diameter, Up to 3/4-Inch Span, CURT 23521 Black Trailer Tongue Coupler Lock

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CURT #ad - This trailer pin lock is protected from the elements with its black painted finish, while the coupler pin is shielded against corrosion with a durable zinc plating. Weather-resistant.

You can keep the spare key in a discrete location for emergencies or give it to a friend for helpful access. With a 1/4-inch diameter pin, this trailer coupler lock fits latch-type couplers with a maximum span of up to 3/4 inches. Dependable security. For your convenience, two keys are included with this trailer tongue lock. Versatile. Two keys included. This padlock-style trailer tongue lock has a heavy-duty look to deter theft, and uses a simple 1/4-turn lock activation for convenient locking and unlocking as needed. Easy to operate. To help protect your trailer from theft, this trailer lock is made from high-strength steel and has a padlock-style design.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height2 Inches
Length7 Inches
Weight0.45 Pounds
Width2 Inches
Part Number23521
Model23521
WarrantyLimited Lifetime Warranty (One-Year Finish, One-Year Parts)

3. Reese

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Reese Towpower 7088300 Heavy Duty Coupler Lock, Black

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Reese #ad - Two theft proof square keys are included. Secures trailer when not being towed. Fits 1-7/8, 2 and 2-5/16 inch trailers. Ratchet design with eleven locking positions. Universal, fits all couplers. Bright theft deterrent silver.
BrandReese #ad
ManufacturerReese Towpower #ad
Height0 Inches
Length0 Inches
Weight4 Pounds
Width0 Inches
Part Number7088300
Model7088300
Warranty1 Year

4. Reese

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Heavy-Duty Steel, Adjustable Storage Security, REESE Towpower 72783 Coupler Lock, Yellow and Chrome

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Reese #ad - Distance between lock shackle holes center to center is 4-1/2 inch. Deters theft: bright, deterrent yellow color is durable, highly visible, and an essential accessory to all types of trailers.

Built to last: the reese towpower universal coupler lock is a premium lock constructed with an aluminum body and heavy-duty steel lock bar. Secure protection: easy-to-install lock resists picking, prying and drill outs. Guards against truck or trailer towaway theft in storage. Dimensions: 9” x 9” x 3”. Universal fit: ratchet design is adjustable with 11 locking positions and fits 1-⅞”, 2”, and 2-5/16” couplers.
BrandReese #ad
ManufacturerReese Towpower #ad
Height9 inches
Length9 inches
Weight1 Pounds
Width3 inches
Part Number72783
Model72783
Warranty1 Year

5. Fastway

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2 Inch and 2 5/16 Inch Couplers, Fastway Fortress 86-00-5015 Maximum Security Universal Coupler Lock for 1 7/8 Inch

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Fastway #ad - Limited Lifetime Warranty. Two barrel-style keys included. Universal compatibility: fits virtually all 1-7/8”, 2”, and 2-5/16” tongue type trailer couplers to prevent your trailer from being stolen. Unique shackle shape designed to prevent the lock from being pried off your trailer. Anti-drill lock design. This style of locks are harder to pick and much safer than others.
BrandFastway #ad
ManufacturerFastway Trailer Products #ad
Height4 Inches
Length15.8 Inches
Weight3 Pounds
Width12.2 Inches
Part Number86-00-5015
Model86-00-5015
Warranty2 year limited warranty

6. CURT

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1/4-Inch Pin Diameter, CURT 23503 Right-Angle Trailer Coupler Lock, Up to 3-Inch Span

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CURT #ad - Ergonomic operation. With a 1/4-inch diameter, segmented pin, this trailer coupler lock fits latch-type couplers spanning from 1 inch up to 3 inches. To help protect your trailer from theft, this trailer tongue lock is made with high-strength steel construction.

This right-angle trailer lock has a built-in swivel feature and simple 1/4-turn lock activation to allow the head to twist toward you for easy, ergonomic access when locking or unlocking your trailer. For your convenience, two keys are included with this trailer tongue lock. Two keys included. Watertight.

You can keep the spare key in a discrete location for emergencies or give it to a friend for helpful access. The internal components of this trailer pin lock can easily be protected from the elements with the included watertight dust cap, while the coupler lock head is shielded against corrosion with a durable anodized aluminum finish. Versatile. Dependable security.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height2 Inches
Length7 Inches
Weight0.5 Pounds
Width2 Inches
Part Number23503
Model23503
WarrantyLimited Lifetime Warranty (One-Year Finish, One-Year Parts)

7. Master Lock

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Master Lock 605DAT Trailer Coupler Padlock, 2 Pack

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Master Lock #ad - Solid brass case for corrosion resistance. This listing is for two 2 solid brass coupler latch locks. Limited lifetime warranty. Matching colored keyhead for added convenience. Opening measures exactly 3/4". Simple installation and removal. Protected case-hardened steel shackle resists cutting and built-in anti-sawing pin for maximum protection. These locks are NOT keyed alike. Works on all 1-7/8" and 2" coupler latches, but not all 2-5/16".
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height5.56 Inches
Length0.9 Inches
Weight1 Pounds
Width3.5 Inches
Part Number605DAT
Model605DAT
WarrantyAs Labeled

8. Master Lock

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Black, Master Lock 379ATPY Universal Trailer Hitch Lock

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Master Lock #ad - 48mm, 2 in. Trailer lock is best used for vehicles, trailers, and RVs. 59mm trailer couplers. Trailer hitch lock is constructed from zinc to resist rust and corrosion. Includes one trailer coupler lock, two keys. Trailer hitch lock fits 1-7/8 in. Trailer coupler lock features advanced locking mechanism to resist picking and prying. 51mm and most 2-5/16 in.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height4.6 Inches
Length5.1 Inches
Weight2 Pounds
Width3.5 Inches
Part Number379ATPY
Model379ATPY
Warranty1 year manufacturer

9. Trimax

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Trimax TMC10 Coupler / Door Latch Lock fits couplers to 3/4" span

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Trimax #ad - Internal o-ring in lock keeps water, grime and dirt out of locking mechanism to ensure years of use. Protective rubber cap protects keyhole from water, grime, and dirt. Protective rubber bumper prevents rattling and abrasion. Fits couplers with up to a 3/4" span. Resists attempted drill outs. Rugged and durable, the key will not bend or break. Type a key which is a spring loaded, 7 pin, high security key.
BrandTrimax #ad
ManufacturerTrimax Locks - Wyers Products #ad
Height5.1 Inches
Length1.5 Inches
Weight0.65 Pounds
Width3.9 Inches
Part NumberTMC10
ModelTMC10
WarrantyLifetime Warranty

10. Trimax

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Black, Trimax UMAX100 Premium Universal Dual Purpose Coupler Lock

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Trimax #ad - Rugged and durable, 7 pin, the key will not bend or break. Crafted from the highest quality material. Type a key which is a spring loaded, high security key. Resists attempted drill outs. One size fits all from 1-7/8", to 2-5/16", 2", all coupler types. Weighs 6 pounds. Key hole cover slides up to seal out dirt and grime. Attractive ballistic grade nylon housing absorbs hammer blows and protects against weather. Made in China. Perfect for outdoor and even indoor use.
BrandTrimax #ad
ManufacturerTrimax Locks - Wyers Products #ad
Height13 Inches
Length17 Inches
Weight4 Pounds
Width13 Inches
Part NumberUMAX100
ModelUMAX100
WarrantyManufacturer Warranty