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  1. Trailer Coupler Locks
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  3. Fits 2 Inch Ball
  4. Surround Lock
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  6. Keyed Unique
AMPLock Trailer Coupler Lock for Square, 2" Ball Couplers - Ductile Cast Iron

AMPLock Trailer Coupler Lock for Square, 2" Ball Couplers - Ductile Cast Iron

Item # AMP84FR
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Our Price: $347.00
Trailer Coupler Locks
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Shipping Weight: 14 lbs
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AMP84FR - Universal Application Lock AMPLock Surround Lock
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Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits square 2" ball couplers. Resists picking, cutting, drilling, and freezing. Tumbler offers nearly 1 million possible key codes. Lowest Prices for the best trailer coupler locks from AMPLock. AMPLock Trailer Coupler Lock for Square, 2" Ball Couplers - Ductile Cast Iron part number AMP84FR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (13)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

AMPLock Trailer Coupler Locks - AMP84FR

  • Fits 2 Inch Ball
  • Surround Lock
  • Cast Iron
  • Keyed Unique
  • AMPLock
  • Universal Application Lock

Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits square 2" 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
  • Molded fit with swivel design decreases hold options for thieves
  • E-coat finish resists corrosion
  • 2 Keys included


Specs:

  • Application: square couplers for 2" ball
    • Great for use on UFP-style actuators
  • Inner width: 3-7/16"
  • Inner height: 5-1/8"
  • 5-Year limited warranty


Coupler Fits:

This lock fits square 2" ball couplers. An example of a coupler it fits is pictured below.


BRU-2 coupler applications

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-BRU-2 AMP Lock Trailer Coupler Lock for Square 2" Ball Couplers - Ductile Cast Iron





Video of AMPLock Trailer Coupler Lock for Square, 2" Ball Couplers - Ductile Cast Iron

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for AMPLock Square Coupler Trailer Coupler Lock Review

What's up everybody It's AJ with etrailer.com. Today we'll gonna be checking out this AMPLock, square coupler lock, on a two inch ball. And it's gonna be a heavy duty lock to put at the end of your coupler, that way nobody can mess with it when you're not around. It's made out of cast iron. So that's how heavy duty it is. Let's check it out.

Now the cast iron portion here is going to be shock absorbent. So that's all this part on the front. So it does a lot of coverage on the coupler, which I really like. And let me get this pry bar here and show you that even though it is exposed there on the end, let's see. So I can't get that in there and pry on that, but again, I don't know that this pry bar is gonna do much against that cast iron.

Something else we noticed was the sides of our lock here on the front are as thick as the pry bar itself we we're using, so I don't think this is gonna do a whole lot. Down here in the bottom, we have a rotating disc tumbler lock, and it's gonna have a million different combinations. You get two keys with it. It's going to be resistant to drilling and picking just because of the way it's set up. So you just kind of turn the key a few times.

Then the lock, the button portion pops down, lets you know that it's disengaged, a nice thing about that though, too, is when you are going to go set up, so let's say I'm getting all this set up on the trailer, I don't need the keys for this part, so I can just push this back up into place and it's locked in there and not going anywhere. But then to undo it, again, like I said, use that key, just turn it. This portion pops back down, and then you can remove the front. With the front cover removed, we can see our two inch ball here. We're going to remove it from the coupler.

So this part works with a lock to kind of take up all that space up there in the coupler. So you see the ball fits right up in there, and the lock portion goes into here, lock it on place. And I really like that 'cause it works together with that front cover, so you can't get in from the sides, this takes up all the space on the inside, really locks everything up nice. Looking at the inside here, just want to give you some inside dimensions just to make sure it's gonna fit on your square coupler. So the inner width is going to be 3-7/16" and the inner height is going to be 5-1/8". Now, if you like this style, and you don't have a square coupler on your trailer, they do make different versions of this for different style trailers with different size, and with lips. So make sure you look into that and get the right one with your trailer. Otherwise though, I think this is gonna be really nice to have. I have confidence in it just because it's got that front cover, and then this takes up that space in the ball, and together, like nobody's going to be messing with my trailer, they're just gonna move on to the next one that doesn't have anything. I think that about does it, thanks for hanging out, and I hope this helped..


Customer Reviews

AMPLock Trailer Coupler Lock for Square, 2" Ball Couplers - Ductile Cast Iron - AMP84FR

Average Customer Rating:  4.9 out of 5 stars   (13 Customer Reviews)

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

- AMP84FR
by:

Nancy was great. I’ll give her 5 stars too!!



- AMP89FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


This lock is a solid and hefty piece of equipment. Make sure to get the right model for your set-up. The width of the lip on my trailer was 3.75” and the lock fits like a glove.



- AMP29FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


These locks are such heavy duty locks that when we lost the key to our first one, we had to hire a locksmith to get the lock off. It was no easy task even for him! Ordering a second lock was easy, customer service is excellent and shipping prompt. I highly recommend this lock if safety of your work vehicles are a priority for you!



- AMP74FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


Heavy built unit. Weighs 10 lbs. It’s expensive but what price do you put on the value of your trailer? They shipped it to me in 4 days.



- AMP44FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


Fits as described. Very solid. I feel like my trailer is definitely secure.



- AMP89FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


these are the best locks ever and locks can be keyed the same.



- AMP89FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


well made. works very smooth. strong.



- AMP74FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


We chose AmpLock because after thorough research we found that this was the must trusted anti-theft device for our travel trailer. We often go out and leave our dogs in the trailer while camping and we didn't want to have to worry about something happening to them should the trailer get stolen. This gives us extra piece of mind. I hope that we don't ever have to find out how well it works, but for now we are very satisfied with our purchase. It did fit perfectly and was easy to install as well.



- AMP74FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks


Strong and simple. It's what you need in a lock!



- AMP74FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks




- AMP89FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks




- AMP74FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks




- AMP64FR
by:

Review from a similar AMP Trailer Coupler Lock in Trailer Coupler Locks



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Ask the Experts about this AMPLock Trailer Coupler Locks



  • Trailer Coupler Lock for 2 5/16 Inch Ball
    For a Demco Easy Latch Coupler with a 2 5/16" ball you will want the etrailer Trailer Coupler Lock for Flat Lip 2-5/16" Ball Coupler - Aluminum - Silver item # e98894. The AMPLock Trailer Coupler Lock for Square item # AMP84FR is for a 2" ball. for a 2 5/16" ball you will want the AMPLock Trailer Coupler Lock for Square item # AMP24FR. These coupler locks are for square couplers though.
    view full answer...
  • Recommended Lock for Bulldog Collar-Lok Coupler
    For your trailer with a 2" Bulldog Collar-Lok coupler I recommend the EZ Lock Trailer Coupler Lock for 1-7/8", 2", 2-5/16" Bulldog Collar-Lok Couplers # BLTL-20-40D. The Amplock you referenced fits a different style of Bulldog coupler. The Blaylock EZ Lock is specifically designed for your coupler style. Once it is attached, the coupler will be inoperable providing you with the security you are looking for.
    view full answer...
  • What is the Strongest Coupler Lock and Locking Pin That Will Fit My Square Coupler
    I do have a recommendation for a coupler lock for your square coupler. I recommend the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # DT25013KA. I recommend the Fastway Universal Lock because it is made to fit various couplers, including square ones like yours. Also, the bolted lock is internal to prevent prying and the key mech is rounded to make it more difficullt to pick. Finally, it fits couplers up to 4" wide and the shackle is 6" long top to bottom,...
    view full answer...
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Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Lindsey S
Written by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Aidan B
Video by:
Aidan B

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