The Best Master Lock Trailer Lock of 2023 – Reviewed and Top Rated

2,084 Reviews Scanned

SaleRank No. #1

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

Universal coupler lock fits virtually all 1-7/8", 2", and 2-5/16" trailer couplers
Bright red finish discourages thief's from messing with your trailer
Resists rust and corrosion. Simple installation and removal
Advanced locking mechanism resists picking and prying

Rank No. #2

Master Lock - (4) Keyed Alike Trailer & Multi Purpose Padlocks, 37KA-4

This listing is for FOUR (4) padlocks keyed alike (same key unlocks all) and eight keys. The lock is also available with Bump Stop Technology. Search 37NKA in our storefront.
APPLICATION: These padlocks are ideal for all outdoor applications when needing multiple locks that utilize ONLY one key. The #37 latch lock works well on 1-7/8 and 2 inch couplers and on virtually all standard hasp applications. These locks have a removable shackle sleeve. Sleeve off - Secures coupler latches. Sleeve on - Works best with hasps. KEY RETAINING - ensures that padlock is not left unlocked.
PADLOCK FEATURES: 1-9/16"(21mm) wide x 3"(76mm) high. Armored Shackle Guard blocks bolt cutters. Revolving, case-hardened steel shackle sleeve resists cutting and sawing. Removable shackle sleeve. Sleeve off - Secures coupler latches to accommodate openings 9/32" (7mm) in diameter. Sleeve on - Works best with hasps, fits openings 1/2" (13mm) in diameter or larger. Precision pin tumbler mechanism resists picking.
IMPORTANT NOTE: If using this style lock on a trailers coupler latch please be aware it is NOT recommended for all 2-5/16 couplers. It will fit some 2-5/16 couplers, the exception being 2-5/16 couplers that have the latch partially recessed from the top surface of the coupler, or latches that are wider than 7/8.
ATTENTION: If you order two 4-packs they will NOT necessarily be keyed the same. To ensure you get two 4-packs keyed alike, you must order the 8-pack.

Rank No. #3

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

For more DETAILED information, please click "See More Product Details".
Complete trailer security system KEYED ALIKE.
(1) coupler lock, (1) receiver lock & (1) latch lock all keyed alike; 1 key opens all 3 locks.
This lock set can NOT be keyed alike with other locks nor can 2 of these lock sets be keyed alike.
The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

Rank No. #4

Master Lock 379ATPY Universal Trailer Hitch Lock , Black

Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
Trailer lock is best used for vehicles, trailers, and RVs
Trailer coupler lock features advanced locking mechanism to resist picking and prying
Trailer hitch lock is constructed from zinc to resist rust and corrosion
Includes one trailer coupler lock, two keys

Rank No. #5

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

LOCK APPLICATION: Best used for vehicles, trailers, and RV hitch locks
EASE OF USE: Receiver lock features convenient Push to Lock locking mechanism: push lock body firmly onto the pin and remove key
DURABLE DESIGN: Weather Tough seal and watertight cap provide protection from moisture and dirt
SPECIFICATIONS: Stainless steel trailer coupler lock adjusts from 9/16 in. to 2-3/4 in.; Fits 1-7/8 in., 2 in. and most 2-5/16 in. couplers
INCLUDES: One trailer coupler lock, one receiver lock, one trailer coupler latch lock; two keys (both keys open all three locks)

Rank No. #6

Master Lock Pro Series Hidden Shackle Padlocks, Keyed Alike 6271NKA-3 w/BumpStop Technology

This listing is for 3 keyed alike locks - 6 keys included. The hardened diecast zinc body is strong, durable and resists corrosion. Pro Series Padlocks are designed for Commercial/Industrial applications. Ideal for transportation, vending, gates, and industrial uses.
These Locks FEATURE BumpStop Advanced Cylinder Technology (For explanation see more product details below).
HIGH SECURITY 6-pin cyclinder for maximum pick resistance. Removable cylinder for replacement or repinning.
BOLT CUTTER TOUGH - fully shielded hardened boron alloy shackle offers impossible to cut and pry resistance features.
DIMENSIONS (see image) - A) 3/8 (10mm), B) 19/32 (15mm), C) 1-23/32 (44mm) Width 2-7/8 (73mm)

Rank No. #7

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

This is a set of 3 Keyed Alike trailer coupler/tongue locks and is ideal when needing multiple locks that utilize ONLY one key. The same key opens all three locks. Each lock comes with two keys, therefore you will receive a total of six keys with the purchase of this 3 pack. Limited Lifetime warranty.
These locks protects unattended trailers and guards against tow-away theft. The universal trailer coupler lock fits 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) couplers by Reese, Fulton, Valley, Atwood, Shelby, Putnam, Hammerblow, Dutton, Lainson, and UFP.
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.
Rekeyable cylinder for keyed alike convenience with an advanced locking mechanism that resists picking and prying. Each lock weighs 2.4 lbs. and is simple to install and remove.
Made with Reinforced Zinc Die-Cast resists rust and corrosion. Few materials provide the strength and toughness of zinc alloys. Impact resistance is significantly higher than cast aluminium alloys, plastics, and grey cast iron. Zinc alloys offer high strengths (to 60,000 psi) and superior elongation for strong designs and formability for bending, crimping and riveting operations.

Rank No. #8

Master Lock 605DAT Shackle 15/16" Length x 7/16" Inner Width, 2" Body Width, Solid Brass Coupler Lock, Gold, 1 Count

Solid brass coupler latch lock with 3/4in (19mm) shackle.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
Precision pin tumbler mechanism for superior pick resistance
Resists rust and corrosion
Lock design protects shackle from cutting and sawing
Case hardened steel shackle

SaleRank No. #9

Master Lock 377DAT Trailer Hitch Lock

Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
Trailer lock is best used for vehicles, trailers, and RVs
Trailer coupler lock features advanced locking mechanism to resist picking and prying
Trailer hitch lock is constructed from zinc to resist rust and corrosion
Includes one trailer coupler lock, two keys

Rank No. #10

Master Lock Trailer Lock, Stainless Steel Adjustable Coupler Latch Lock, 2847DAT

LOCK APPLICATION: Best used for vehicles, trailers, and RV hitch locks
EASE OF USE: Six locking positions provide maximum flexibility; Rekeyable cylinder offers keyed-alike convenience
DURABLE DESIGN: Water-tight cap protects trailer hitch lock from moisture and dirt
SPECIFICATIONS: Coupler lock adjusts from 9/16 in. to 2-3/4 in. length
INCLUDES: One trailer coupler latch lock, two keys

Rank No. #11

Master Lock 1471DAT Trailer Coupler Latch Lock, 3-1/2" Long Shackle x 9/32" Diameter Pin Silver, Fits UFP and surge brake couplers

This Master Lock protects and guards against tow-away theft. The lock works when the trailer is either connected to the tow vehicle or when the trailer is unattached. 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.
Fits UFP and surge brake couplers. K1 key blank
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.
Chrome plated for improved wear and corrosion resistance. It has a precision 4 pin tumbler mechanism that resists picking
Weather Tough seal and water tight cap protects the lock from the elements

Rank No. #12

Master Lock Receiver Lock, Stainless Steel Barbell™ Receiver Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT, Silver and Red

LOCK APPLICATION: Best used for vehicles, trailers, and RV hitch locks
EASE OF USE: Receiver lock features convenient Push to Lock locking mechanism: push lock body firmly onto the pin and remove key
DURABLE DESIGN: Weather Tough seal and watertight cap provide protection from moisture and dirt; Hitch lock is rated for Class III/IV 10,000 pound load
SPECIFICATIONS: Usable length of receiver pin is 3-1/2 in.; Stainless steel lock fits 5/8 in. receiver openings; Extended length shaft fits Toyota Tundra, Ford F-150/F-250/F-350, GMC/Chevy 2500/3500 and Dodge trucks with heavy-duty tow packages
INCLUDES: One trailer reciver lock, two keys

Rank No. #13

Master Lock M40XT Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Pack of 2 Keyed Alike

Indoor and outdoor padlock with key; maximum security lock with Tough-Cut octagonal boron-carbide shackle is best used as a storage unit lock, garage lock, shed lock, trailer lock, and moving truck lock.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
Key lock is constructed with Tough-Cut octagonal boron-carbide shackle which is 50% harder than hardened steel; shrouded design minimizes shackle exposure and protects against bolt cutter attacks
Four-pin cylinder for maximum pick resistance; reinforced body bumper for scratch resistance
2-3/4 in. (70 mm) wide lock body; 3/8 in. (10 mm) diameter shackle with 5/8 in. (16 mm) length, 1-1/32 in. (28 mm) width
Includes two padlocks, two keys; both keys open all locks

Rank No. #14

Master Lock Pro Series - (3) Hidden Shackle Padlocks Keyed Alike 6271KA-3

Three (3) high security ProSeries Padlocks designed for Commercial/Industrial applications. Locks are keyed alike w/ 6 total keys. 2-7/8" (73mm) wide reinforced zinc die-cast lock body (see more product details below). Ideal for transportation, vending and many other applications.
FITMENT: Please see more product details below to help ensure these locks will work.
ATTENTION: If you order two 3-packs they will NOT necessarily be keyed the same. To ensure you get two 3-packs keyed alike, you must order the 6-pack.
See image for reference - Shackle Dimensions - A: 3/8in (9mm) B: 19/32in (15mm) C: 1-23/32in (44mm). Lock body conceals the shackle! Fully shielded 3/8 (9mm) diameter hardened boron alloy shackle offers impossible to cut and pry resistance features.
High security, re-keyable 6-pin cylinder with spool pins is virtually impossible to pick. Lifetime guarantee. This lock is also available with the BumpStop Technology. Search 6271NKA in Amazon's search window.

SaleRank No. #15

Master Lock 40KADPF Round Padlock with Shielded Shackle, Stainless Steel,Silver

2-3/4-inch (70mm) wide stainless steel body
Hardened steel shackle for extra cut resistance
4-pin cylinder helps prevent picking
Double deadbolt locking to guard against pulling
Fully shielded design minimizes shackle exposure

Rank No. #16

Master Lock 2878DAT 0.875" Wide Trailer Coupler Latch Lock

0.875 inch shackle fits most popular trailer coupler latch widths
Features covered keyway that resists moisture, dirt and corrosion
Includes a removable python cylinder
Ergonomic handle for easy installation

Rank No. #17

Master Lock Trailer Lock, Trailer Coupler Lock, Fits 2-5/16 in. Couplers, 378DAT

Coupler lock is best used for trailers; Works best with Straight Tongue Trailer Couplers
Advance locking mechanism resists picking and prying
Designed to resist rust and corrosion
Fits 2-5/16 in. (59 mm) trailer couplers; Does not fit Gooseneck Trailer Couplers
Includes one trailer coupler lock, two keys

SaleRank No. #18

Master Lock Trailer Lock, Universal Trailer Coupler Lock, 379DAT , Silver , Standard

Best used for vehicles, trailers, and RV hitch locks
Trailer hitch lock is easy to install and remove
Trailer coupler resists rust and corrosion; Advanced locking mechanism resists picking and prying
Fits most 1-7/8 in. (48 mm), 2 in. (51 mm) and 2-5/16 in. (59 mm) couplers: Reese, Fulton, Valley, Atwood, Shelby, Putnam, Hammerblow, Dutton Lainson, UFP
Includes one coupler lock, two keys

Rank No. #19

Master Lock 605DAT Trailer Coupler Padlock - 2 Pack

This listing is for two (2) solid brass coupler latch locks. These locks are NOT keyed alike.
Works on all 1-7/8" and 2" coupler latches, but not all 2-5/16". Opening measures exactly 3/4".
Protected case-hardened steel shackle resists cutting and built-in anti-sawing pin for maximum protection.
Solid brass case for corrosion resistance. Simple installation and removal.
Matching colored keyhead for added convenience. Limited lifetime warranty.

Rank No. #20

Master Lock 2848DAT Key Alike Set with Receiver and Coupler Latch Locks, 2-Piece Set

LOCK APPLICATION: Best used for vehicles, trailers, and RV hitch locks
EASE OF USE: Receiver lock features convenient Push to Lock locking mechanism: push lock body firmly onto the pin and remove key
DURABLE DESIGN: Weather Tough seal and watertight cap provide protection from moisture and dirt
SPECIFICATIONS: Usable length of receiver pin is 2-3/4 in.; Stainless steel lock fits 1/2 in. and 5/8 in. receiver openings
INCLUDES: One receiver lock, one stainless steel coupler latch lock, two keys; both keys open both locks

Last update on 2023-08-08 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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The Best Master Lock Trailer Lock of 2023 – Reviewed and Top Rated

How Do You Buy The Best Master Lock Trailer Lock?

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