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1. Blaylock Industries

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Blaylock TL-50 Gooseneck-Style Coupler Lock

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Blaylock Industries #ad - Patented design ensures the most secure way to leave an unattended trailer. Solid hardened steel lock rod for security. Crafted with the highest grade aircraft aluminum. Fits all gooseneck 2 5/16 style couplers. For heavy trailers, livestock haulers, RVs.
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BrandBlaylock Industries #ad
ManufacturerBlaylock #ad
Height4.5 Inches
Length11.1 Inches
Weight7 Pounds
Width7 Inches
Part Number0229.3000
Model0229.3000
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2. Master Lock

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

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Master Lock #ad - Simple installation and removal. We can not key two 2 of these locks the same. Advanced locking mechanism resists picking and prying. Resists rust and corrosion. The similar 379KA coupler locks are available keyed alike.
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The only difference between this one 389DAT and the 379KA is the color. 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.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height7.5 Inches
Length6.5 Inches
Weight2 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.
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3. Ft. Knox Locks

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Gooseneck Lock includes Trimax puck lock, BOLT CUTTER PROOF!!!

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Ft. Knox Locks #ad - Bolt cutter Proof. Ultra high security and fits most gooseneck couplers including Bulldog BX1. Bright yellow powder coat finish. All welded steel construction. High security Trimax Puck lock.
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BrandFt. Knox Locks #ad
ManufacturerFt. Knox Locks #ad
Height5 Inches
Length11.5 Inches
Weight18 Pounds
Width8.5 Inches
Part NumberGN-T
ModelGN-T
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4. Blaylock American Metal

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Blaylock American Metal TL-53 Coupler Lock

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Blaylock American Metal #ad - Strong and Secure. Includes 2 keyed-alike padlocks. 3/4 steel Locking Pin. Heavy-duty aircraft aluminum. Deluxe gooseneck Combo Lock.
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BrandBlaylock American Metal #ad
ManufacturerBlaylock American Metal #ad
Part NumberTL-53
ModelTL-53
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5. Master Lock

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

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Master Lock #ad - Couplers. Ease of use: trailer hitch lock is easy to install and remove. Durable design: trailer coupler resists rust and corrosion; Advanced locking mechanism resists picking and prying.
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Lock application: Best used for vehicles, trailers, and RV hitch locks. Specifications: Fits 2-5/16 in. Includes: One coupler lock, two keys.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height3.45 Inches
Length8.85 Inches
Weight3.6 Pounds
Width6.27 Inches
Part Number378DAT
Model378DAT
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6. Ft. Knox Locks

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Gooseneck Lock, BOLT CUTTER PROOF!!!, Ultra High Security

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Ft. Knox Locks #ad - Bolt cutter Proof. All welded steel construction. Bright yellow powder coat finish. Accepts most "puck" style locks not included. Ultra high security and fits most gooseneck couplers including Bulldog BX1.
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BrandFt. Knox Locks #ad
ManufacturerFt. Knox Locks #ad
Height5 Inches
Length11.5 Inches
Weight18 Pounds
Width8.5 Inches
Part NumberGN-L
ModelGN-L
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7. Master Lock

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Master Lock 470-377DAT Nickel Chrome Finish, Zinc Die Cast Coupler Lock

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Master Lock #ad - Adjusts to fit many makes and models. 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.
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Fits 1-7/8" and 2" couplers. Advance locking mechanism resists picking and prying. Nickel-plated, zinc die-cast body with a front access key-way for ease of accessibility. Uses the master lock K1 key system.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Height2.68 Inches
Length6.56 Inches
Weight1 Pounds
Width7.5 Inches
Part Number470-377DAT
Model377DAT
WarrantyLIMITED WARRANTY
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8. Master Lock

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Master Lock 377KA Trailer Hitch Lock, 2 in., and Most 2-5/16 in. Trailer Couplers, Fits 1-7/8 in., Chrome

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Master Lock #ad - 59mm trailer couplers. 48mm, 2 in. Trailer coupler lock features advanced locking mechanism to resist picking and prying. One trailer coupler lock, two keys.
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Trailer hitch lock is constructed from zinc to resist rust and corrosion. Trailer hitch lock fits 1-7/8 in. Trailer lock is best used for vehicles, trailers, and RVs. 51mm and most 2-5/16 in.
BrandMaster Lock #ad
ManufacturerMASTER LOCK #ad
Height2.8 Inches
Length5.6 Inches
Weight2.2 Pounds
Width4.3 Inches
Part Number377KA
Model377KA
WarrantyLimited Lifetime Warranty
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9. Blaylock American Metal

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Blaylock TL-33 Coupler Lock

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Blaylock American Metal #ad - For commercial and recreational use. Covers brands & styles of receivers including Buyers, Titan, Fulton, U-Haul, Pro-Series, Atwood, Demco to name a few. Fits 2" and 2-5/16" couplers, Three hole positions for multiple coupler applications.
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Fits over 30 different coupler style brands. Read product description below for more information. Crafted with pride in the United States of the highest grade aircraft aluminum.
BrandBlaylock American Metal #ad
ManufacturerBlaylock American Metal #ad
Height5 Inches
Length7.9 Inches
Weight3 Pounds
Width5.6 Inches
Part NumberTL-33
ModelTL-33
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10. Master Lock

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Master Lock, Gooseneck Coupler Trailer Locks 2989KA

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Master Lock #ad - Fits both fixed and adjustable style Gooseneck /Fifth Wheel Style Trailer Couplers. If you order multiples of this lock, they will NOT be keyed alike. Easy to install and remove.
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Powder Coated finish resists corrosion. Re-keyable python Cylinder. Keyway cover protects lock from moisture and dirt. Laminated steel frame construction for reliable performance. Fits 3" lunette Rings and King Pin.
BrandMaster Lock #ad
ManufacturerMaster Lock #ad
Part Number2989KA
Model2989KA
WarrantyLimited 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.
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