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  1. Trailer Tongue Lock
  2. AMPLock
  3. Fits 2-5/16 Inch Ball
  4. Surround Lock
  5. Keyed Unique
  6. Cast Iron
AMPLock Trailer Coupler Lock for Underslung 2-5/16" Ball Couplers - Ductile Cast Iron
AMPLock

AMPLock Trailer Coupler Lock for Underslung 2-5/16" Ball Couplers - Ductile Cast Iron

Part Number: AMP56FR
In Stock
$199.43
Trailer Tongue Lock
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Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits 2-5/16" underslung ball couplers. Resists picking, cutting, drilling, and freezing. Tumbler offers nearly 1 million possible key codes. Great Prices for the best trailer tongue lock from AMPLock. AMPLock Trailer Coupler Lock for Underslung 2-5/16" Ball Couplers - Ductile Cast Iron part number AMP56FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (3)
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AMPLock Trailer Tongue Lock - AMP56FR

  • Fits 2-5/16 Inch Ball
  • Surround Lock
  • Keyed Unique
  • Cast Iron
  • AMPLock
  • Universal Application Lock
  • Underslung Style

Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits 2-5/16" underslung ball couplers. Resists picking, cutting, drilling, and freezing. Tumbler offers nearly 1 million possible key codes.


Features:

  • Tamper-resistant, sturdy lock deters trailer theft by preventing hookup
    • Fits over coupler, engaging it like a trailer ball does and blocking the ball opening
    • Prevents would-be thieves from hitching your trailer to their tow vehicle
  • Push-and-lock cylinder locks without the need for a key
    • Lock's location on bottom makes it difficult for thieves to access
  • Rotating-disc-tumbler lock provides maximum security
    • Nearly a million possible key codes
    • Resistant to picking and drilling
  • Heavy-duty ductile cast iron construction
    • Absorbs shock to prevent breaking
    • Resists any kind of cutting, including cutting with a torch or liquid nitrogen
  • E-coat finish resists corrosion
  • 2 Keys included


Specs:

  • Application: underslung ball couplers for 2-5/16" balls
    • Maximum coupler width (including lip): 4-3/4"
    • Maximum lip thickness: 2-7/16"
  • Lock pin diameter: 7/8"
  • 5-Year limited warranty


Coupler Fits:

This lock fits underslung 2-5/16" ball couplers. An example of a coupler it fits is pictured below.


2516i coupler application

Secure Locking Mechanism

This coupler lock has a disc tumbler locking mechanism. Unlike locks that use vulnerable spring-loaded pins, this ultra-secure lock is bump-proof. The cylinder has a series of rotating discs that can be correctly lined up only when you turn the corresponding key. Two identical notched keys are included to operate the lock. Because these keys feature 1 of nearly a million possible key codes, it's extremely unlikely that another individual will have a key that can open this lock.



U-TLS-2516I AMP Lock Coupler Lock for Underslung 2-5/16" Ball Couplers - Ductile Cast Iron





Customer Satisfaction Score:

Ratings & Reviews

3.7

3 reviews
Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits 2-5/16" underslung ball couplers. Resists picking, cutting, drilling, and freezing. Tumbler offers nearly 1 million possible key codes.

by:

This is the best trailer tung lock I have ever used. Heavy duty, well built, with a very unique key system that was well thought out. YES, I would highly recommend the AMP LOCK SYSTEM FOR YOUR TRAILER. YOU WONT BE DISAPPOINTED.



by:

The lock is heavy duty and great. But it DID NOT work on my 2022 Jayco Micro. The lock mechanism needs to be about ?” shorter to clear the lower lip of the trailer hitch. e trailer wanted a 20% restocking fee plus for me to pay for shipping since I was outside my return window. The trailer was in for service so I could not test it out before the return policy ended. So I am either going to sell it or try to modify it myself.I would not buy it again for my 2022 Jayco.

Heather A. profile picture
Etrailer Expert

Heather A.

9/30/2022

This lock is for a underslung coupler. Most underslung couplers do not have a lower lip. If you could send me a photo of the coupler on your Jayco I am happy to assist you.



by:


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See what our Experts say about this AMPLock Trailer Tongue Lock


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Installed by:
Michael B

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