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  1. Trailer Coupler Locks
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AMPLock Trailer Coupler Lock for Flat Lip 2-5/16" Ball Couplers - Ductile Cast Iron

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

Item # AMP74FR
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Our Price: $265.00
Trailer Coupler Locks
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Shipping Weight: 12 lbs
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Trailer Coupler Locks AMP74FR - Cast Iron - AMPLock
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Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits standard 2-5/16" ball couplers with flat lips. 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 Flat Lip 2-5/16" Ball Couplers - Ductile Cast Iron part number AMP74FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (16)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

AMPLock Trailer Coupler Locks - AMP74FR

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

Use this heavy-duty cast iron coupler lock to help prevent trailer towaway theft. Fits standard 2-5/16" ball couplers with flat lips. 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: standard ball couplers for 2-5/16" balls
    • Coupler must have flat lip
    • Maximum coupler width (including lip): 4-9/16"
    • Maximum lip thickness: 7/16"
    • Great for use on couplers with the Demco composite EZ Latch, A-frame couplers with thumb latches, flat mount couplers, and more (see below for more examples)
  • 5-Year limited warranty


Coupler Fits:

This lock fits 2-5/16" ball couplers with a flat lip. Examples of some of the couplers it fits are pictured below.


BRP-2516 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-BRP-2 5/16 AMP Lock Trailer Coupler Lock 2-5/16" Ball Couplers with Straight Lip - Ductile Cast Iron





Video of AMPLock Trailer Coupler Lock for Flat Lip 2-5/16" 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 Flat Lip 2-5/16 inch Ball Coupler Trailer Coupler Lock Review

What's up everybody, it's AJ with etrailer.com. Today we're gonna be checking out the AMP lock two and five sixteen ball flat lip coupler lock. So this is going to go right here on the coupler, on the front of your trailer. And it's going to keep anybody from pulling here and hooking it up to your trailer and taking it when you're not around. What sets apart this lock from other ones is some of the ones just have like a little tab that's going to cover up the coupler. And that can be pried out with a tool, or you can get around that.

This ball goes all the way up in here. It takes up all that space. So it's going to be hard to even get a tool in there and you're not going to be able to hook up anything else to it. So that's that extra protection and you have the cast iron part here. That's going to go over the lip of the trailer.

So you can see this groove here is exactly for that. And this is going to fit right there in the ball, put into place. You can just push the cylinder at the bottom and it's locked in. You're gonna get two keys with it. That way you can put one on the key ring, leave one in your truck just in case you lose it.

And you got a rotating disc tumbler lock here at the bottom. So that's going to be resistance to drilling or anybody trying to pick it, they're not going to get through to it. It's really easy. We just put the key in there turn and the cylinder will drop down. They know it's unlocked.

So right now it's unlocked so I can remove the key and then slide it off. Outside you have the cast iron portion that goes over the flat lip here on the coupler and that's going to be shock absorbent. So even if somebody was going to hit it with a hammer or something it's going to be able to absorb that punishment and not get destroyed. In addition to our coupler lock I would recommend getting a coupler latch lock. This is going to go right in here and lock this up. That way nobody can mess with this or this. We have them on our website. So just look for a coupler latch lock. The maximum width of the coupler with a flat lip is going to be four nine sixteen". Now the maximum thickness of that lip is going to be seven sixteenth of an inch. The other thing to point out is the ball itself is only going to fit two and five sixteen" couplers. Overall I think is going to be very useful to have just seeing this on the front of the trailer is going to keep people from messing with it. They're just going to see that and move on to the next one. If they want to mess with something but otherwise it will be locked up. You got all that protection there and nobody can hook up or even really pry out on it. So it's going to keep your trailer protected. I think that does it. Thanks for hanging out. I hope this helped..


Customer Reviews

AMPLock Trailer Coupler Lock for Flat Lip 2-5/16" Ball Couplers - Ductile Cast Iron - AMP74FR

Average Customer Rating:  4.9 out of 5 stars   (16 Customer Reviews)

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

by:

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.



by:

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.



by:

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



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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.



by: 06/01/2022

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


Excellent, heavy-duty product!



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!



by:

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


the product is as advertised. expensive but much more heavy duty than any other I looked at before buying. the info on the website was helpful also.



by:

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


This is the best I've found for a 20K Demco coupler. Easy to install, proprietary keys, really really good quality.If you see how its designed and works it'll help understand the cost.If I had a claim w the piece attached to this coupler, at least the insurance co would see I made every effort to protect my asset.Buy Once cry once. If someone gets past this to get your equipment,there was not much you could do to protect it. etrailer has done well carrying quality equipment.zero complaints.



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.



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.



by:

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


well made. works very smooth. strong.



by:

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


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



by:

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




by:

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



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Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Lindsey S
Written by:
Lindsey S
Employee Chris R
Video Edited:
Chris R
Employee Aidan B
Video by:
Aidan B

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