Top 10 Masterlock Trailer Coupler Lock – Towing Hitch Locks

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1. Master Lock

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

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Master Lock #ad - Universal coupler lock fits virtually all 1-7/8", 2", and 2-5/16" trailer couplers. Resists rust and corrosion. The bright red finish discourages thiefs from messing with your trailer. Advanced locking mechanism resists picking and prying. Simple installation and removal. This lock protects unattended trailers and guards against tow-away theft.
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. Master Lock

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Coupler Lock, 3 Components Keyed Alike, Master Lock 3895DAT, Receiver Lock and Latch Lock

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Master Lock #ad - 1 coupler lock, 1 receiver lock & 1 latch lock all keyed alike; 1 key opens all 3 locks. For more detailed information, please click "See More Product Details". The limited lifetime Warranty provides peace of mind from a brand you can trust. Complete trailer security system KEYED ALIKE. This lock set can not be keyed alike with other locks nor can 2 of these lock sets be keyed alike.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height3.5 Inches
Length9 Inches
Width6.25 Inches
Part Number3895DAT
Model3895DAT
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.

3. Master Lock

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Master Lock 605DAT Shackle 15/16" Length x 7/16" Inner Width, 2" Body Width, Solid Brass Coupler Lock

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Master Lock #ad - Solid brass body. Solid brass coupler latch lock with 3/4in 19mm shackle. Resists rust and corrosion. Precision pin tumbler mechanism for superior pick resistance. Precision pin tumbler mechanism resists picking. Case hardened steel shackle. Measures 2 inches. Lock design protects shackle from cutting and sawing.
BrandMaster Lock #ad
ManufacturerMini-Mule #ad
Height2.17 Inches
Length0.47 Inches
Weight0.44 Pounds
Width1.38 Inches
Part Number470-605DAT
Model605DAT
WarrantyLIMITED WARRANTY

4. Master Lock

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Master Lock 377DAT Trailer Hitch Lock

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Master Lock #ad - One of the unique features of this product is the ratcheting shaft which allows it to fit most 1-7/8 inch and 2 inch couplers. Nickel-plated, zinc die-cast body with a front access key-way for ease of accessibility. Includes one trailer coupler lock, two keys. Trailer lock is best used for vehicles, trailers, and RVs. 59mm trailer couplers. Trailer coupler lock features advanced locking mechanism to resist picking and prying. 51mm and most 2-5/16 in. Trailer hitch lock is constructed from zinc to resist rust and corrosion. Trailer hitch lock fits 1-7/8 in. 48mm, 2 in.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height2.68 Inches
Length6.56 Inches
Weight1 Pounds
Width7.5 Inches
Part Number470-377DAT
Model377DAT
WarrantyLIMITED WARRANTY

5. Master Lock

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Master Lock 1471DAT Trailer Coupler Latch Lock, 3-4/10" Long Shackle x 9/32" Diameter Pin

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Master Lock #ad - Fits ufp and surge brake couplers. This master lock protects and guards against tow-away theft. Pin length or dimensional fit is 3-1/2" wide with a 9/32" diameter pin which is a standard size on virtually all couplers.

The lock works when the trailer is either connected to the tow vehicle or when the trailer is unattached. Weather tough seal and water tight cap protects the lock from the elements. Chrome plated for improved wear and corrosion resistance. It has a precision 4 pin tumbler mechanism that resists picking. K1 key blank. The lock prevents the coupler latch from moving, therefore preventing either the coupler to be removed from the ball, or not allowing a ball to be placed into the coupler.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height2 Inches
Length9.1 Inches
Weight0.75 Pounds
Width5 Inches
Part Number1471DAT
Model1471DAT
Warranty2 year manufacturer

6. Master Lock

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Fits 1-7/8" and 2" Couplers, 8 Keyed Alike Trailer Coupler Locks 377KA-8, Master Lock

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Master Lock #ad - Specifications: fits 1-7/8", 2" and some 2-5/16" trailer couplers. Limited lifetime Warranty provides peace of mind from a brand you can trust. For 2-5/16" couplers we recommend a different lock, search Master Lock 379KA. Advanced locking mechanism resists picking and prying. Durable design: aluminum diecast finish resists rust and corrosion. If you order two 8-packs or any multiple of this lock we will automatically key them all the same. Easy to install and remove. This listing is for 8 eight 377KA coupler locks keyed alike and 16 keys.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Weight25 Pounds
Part Number377KA8
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.

7. Trailer Coupler Locks - Keyed Alike

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Master Lock, 3 Keyed Alike Universal Trailer Coupler Locks 379KA-3

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Trailer Coupler Locks - Keyed Alike #ad - Made with reinforced zinc die-cast resists rust and corrosion. In stock with a delivery time of 1 to 5 days. Limited Lifetime warranty. Each lock comes with two keys, therefore you will receive a total of six keys with the purchase of this 3 pack. Rekeyable cylinder for keyed alike convenience with an advanced locking mechanism that resists picking and prying.

The same key opens all three locks. And is simple to install and remove. Impact resistance is significantly higher than cast aluminium alloys, plastics, 000 psi and superior elongation for strong designs and formability for bending, and grey cast iron. This simple design is difficult to defeat because when it's locked on the trailer the lock rests on top of the coupler see image thus thwarting blunt force from downward hammer strikes.

It also rotates less rigidity making it harder to break with sledge hammer force. Zinc alloys offer high strengths to 60, crimping and riveting operations. This is a set of 3 keyed alike trailer coupler/tongue locks and is ideal when needing multiple locks that utilize ONLY one key. These locks protects unattended trailers and guards against tow-away theft. Few materials provide the strength and toughness of zinc alloys. Each lock weighs 2.
BrandTrailer Coupler Locks - Keyed Alike #ad
ManufacturerTrailer Coupler Locks - Keyed Alike #ad
Weight2.4 Pounds
Part Number379KA3
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.

8. Master Lock

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Master Lock, 4 Keyed Alike Universal Trailer Coupler Locks 379KA-4

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Master Lock #ad - Few materials provide the strength and toughness of zinc alloys. The same key opens all four locks. Rekeyable cylinder for keyed alike convenience with an advanced locking mechanism that resists picking and prying. Each lock comes with two keys, therefore you will receive a total of eight keys with the purchase of this 4 pack.

Impact resistance is significantly higher than cast aluminium alloys, 000 psi and superior elongation for strong designs and formability for bending, and grey cast iron. It also rotates less rigidity making it harder to break with sledge hammer force. And is simple to install and remove. Limited Lifetime warranty. This simple design is difficult to defeat because when it's locked on the trailer the lock rests on top of the coupler see image thus thwarting blunt force from downward hammer strikes.

The universal trailer coupler lock fits 1-7/8in 48mm, fulton, hammerblow, Lainson, Dutton, Valley, 2in 51mm and most 2-5/16in 59mm couplers by Reese, Putnam, Atwood, Shelby, and UFP. Each lock weighs 2. 4 lbs. This is a set of 4 keyed alike trailer coupler/tongue locks and is ideal when needing multiple locks that utilize ONLY one key. Zinc alloys offer high strengths to 60, plastics, crimping and riveting operations. Made with reinforced zinc die-cast resists rust and corrosion.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Part NumberB007BPTZU8
Model379KA-4
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.

9. Master Lock

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Master Lock 379ATPY Universal Trailer Hitch Lock , Black

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Master Lock #ad - Trailer coupler lock features advanced locking mechanism to resist picking and prying. 59mm trailer couplers. Trailer hitch lock is constructed from zinc to resist rust and corrosion. Trailer lock is best used for vehicles, trailers, and RVs. Trailer hitch lock fits 1-7/8 in. 48mm, 2 in. Includes one trailer coupler lock, two keys. 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

10. Master Lock

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Red, 3794DAT , Master Lock Trailer Lock, Trailer Coupler & Receiver Lock Combo Pack

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Master Lock #ad - And most 2-5/16 in. Includes: one trailer coupler lock, one receiver lock, one trailer coupler latch lock; two keys both keys open all three locks. Lock application: Best used for vehicles, trailers, and RV hitch locks. Couplers. Specifications: stainless steel trailer coupler lock adjusts from 9/16 in. Durable design: weather Tough seal and watertight cap provide protection from moisture and dirt. To 2-3/4 in. Fits 1-7/8 in. 2 in. Ease of use: receiver lock features convenient Push to Lock locking mechanism: push lock body firmly onto the pin and remove key.
BrandMaster Lock #ad
ManufacturerMASTER LOCK #ad
Height4 Inches
Length10 Inches
Weight1 Pounds
Width5 Inches
Part Number3794DAT
Model3794DAT
Warranty1 year manufacturer