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  1. Trailer Tongue Lock
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  4. 3-3/8 Inch Span
MaxxTow Coupler Latch Lock for Surge Brake Actuators - 3-3/8" Span - 1/4" Diameter
MaxxTow

MaxxTow Coupler Latch Lock for Surge Brake Actuators - 3-3/8" Span - 1/4" Diameter

Part Number: MT76FR
In Stock
$25.40
Trailer Tongue Lock
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This 1/4" pin lock inserts through the latch on your surge brake actuator or standard ball coupler to keep your trailer coupler secured on your hitch ball. Carbon steel construction with black e-coat resists corrosion. Great Prices for the best trailer tongue lock from MaxxTow. MaxxTow Coupler Latch Lock for Surge Brake Actuators - 3-3/8" Span - 1/4" Diameter part number MT76FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (13)
  • Q & A (0)
  • Videos (2)
  • Photos

MaxxTow Trailer Tongue Lock - MT76FR

Highlights

  • Secure trailer locking: 1/4" pin lock deters theft by securing trailer coupler.
  • Durable construction: Made of carbon steel with black e-coat for corrosion resistance.
  • Weather-resistant design: PVC dust cap protects cylinder from water and debris.
  • Fits multiple latches: Compatible with surge brake actuators and standard ball couplers.
  • Comes with 2 keys: Ensures you have a backup, enhancing convenience.
  • 3-3/8" span size: Perfect for specific trailer couplers needing this exact dimension.

Features to know about

Keep Your Trailer Secure: 1/4" Pin Lock for Latch and Brake Actuator

Worried about the security of your trailer when you're not around? The MaxxTow Coupler Latch Lock has you covered with its 1/4" pin lock that fits snugly through the latch on your surge brake actuator or standard ball coupler. This prevents would-be thieves from easily unhooking your trailer, offering strong peace of mind every time you leave your trailer unattended.

Durable and Weather-Ready: Carbon Steel with Black E-Coat

Avoid the hassle of corrosion with the tough construction of this lock. Built from carbon steel and finished with a black e-coat, this lock is designed to withstand the harshness of the elements. Whether it's rain, dust, or snow, your lock stays rust-free and secure.

Convenience with Every Use: Includes 2 Keys

No need to worry about losing a key with the MaxxTow Coupler Latch Lock. It comes with 2 keys, so you always have a spare. Easily secure and remove your lock without the fear of misplacing the only key, making hitching up or detaching a breeze every time.

Hassle-Free Operation: Weather-Resistant PVC Dust Cap

Protect your lock's cylinder from water and debris with the thoughtful inclusion of a weather-resistant PVC dust cap. No more struggling with jammed or corroded locks; smooth operation is guaranteed every time you need it.

Tailored Fit for Your Needs: 3-3/8" Pin Length for Various Applications

The 3-3/8" pin span offers a versatile fit suitable for both surge brake actuators and standard latch-style ball couplers. This ensures compatibility across a wide range of towing setups—ideal for anyone who frequently switches between different trailers.

Specs

Application

  • Application: surge brake actuators and standard latch-style ball couplers

Dimensions

  • Pin diameter: 1/4"
  • Inside pin length (span): 3-3/8"

50189 Maxx Tow Trailer Coupler Lock - 3-3/8" Span - Black Steel





Video of MaxxTow Coupler Latch Lock for Surge Brake Actuators - 3-3/8" Span - 1/4" Diameter

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




Video Transcript for What to Know About the MaxxTow Coupler Latch Lock for Surge Brake Actuators

AJ: What's up everybody It's AJ with etrailer.com. Today, we're going to be checking out this MaxxTow latch lock. What this is going to do, it's going to slide in this hole here on your latch on your coupler. That way you can't open it. If it's not connected to anything, nobody can connect to anything and take it from you, or if your ball is in here, it locks it to your ball. That way no one can disconnect it from your vehicle.

Let's check it out.There's a lock cylinder here. It's textured so you can kind of grab it. It gives you a little bit of grip, just that you can hold it and unlock. It comes with two keys to do that. Once you take it off, it's got a rubber cover just to cover up the lock mechanism.

That way no dust, grime, or any the elements get in there to erode it and ruin it for you. You can easily cover that up, and it's no problem. That'll put it on there. You don't have to push the key in there. Sometimes you have to have the key in there or twist it to twist it on.

This one you just push on, and it goes right into place. So now it's locked, and nobody can mess with the latch.Overall, it's black, e-coated steel. So it's going to hold up when you leave it outside. So you don't have to worry about the elements bothering it or eroding it or rusting it. It feels pretty durable.

Nothing's perfect, but it's definitely going to keep people from messing with your trailer. They're going to take one look at it and see it's got the lock whether it's attached to your vehicle or not and probably just go on to the next one that doesn't have a lock. They're not even going to bother with this one.Since every trailer is not the same, this does come in a couple of different sizes. What we're going to be talking about is this one's going to be 2-1/2", and that's the inside span here. The pin itself is a 1/4" thick. Now, the quarter inch thick pin is going to be the same on all of them, but the sides are going to be different. So if you need one that's a little bit smaller, your coupler is different than this, you can go to the 7/8, and again, that's from here to here. If you need to go bigger, you get 3-5/8, and that's going to be from here to here.Whichever one you decide to go with, they're going to keep your latch locked keeping people from messing with your trailer. Well, I think that does it. Thanks for hanging out, and I hope this helped.

Ratings & Reviews

4.8

13 reviews
This 1/4" pin lock inserts through the latch on your surge brake actuator or standard ball coupler to keep your trailer coupler secured on your hitch ball. Carbon steel construction with black e-coat resists corrosion.

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Used these to secure my Erickson Mesh Tarp when hauling mulch on my trailer. Easy to use, tighten and release. Great investment.



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The 7/8" coupler latch lock works as stated and shipping was fast.



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It fits perfectly and is not looks great



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Gave a 4 star rating due to the fact that I just received the item and I have not used it yet.



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See what our Experts say about this MaxxTow Trailer Tongue Lock

  • Can The MaxxTow Coupler Latch Lock Be Keyed Alike?
    I took a look at The MaxxTow Coupler Latch Lock for Surge Brake Actuators # MT76FR that you mentioned, and it doesn't look like it can't be keyed alike, however I do have another alternative for you. If you're okay with a little shorter span (1/4" difference), then the etrailer Surge Brake Coupler Lock # e98888 will work great and can be keyed alike, like you're needing. This coupler lock is made from sturdy steel construction, features a nice chrome finish, and includes 2 reversible,...
    view full answer...
  • Pin Diameter of 3-5/8 Inch Long Trailer Coupler Locks
    The 3-5/8 inch long trailer coupler locks do only have pin diameters of 1/4 inch; there isn't a coupler lock available with a pin that has a slightly larger diameter, as the 1/4 inch is indeed standard. The locks that are 3-5/8 inches long are as follows: - Bulldog Easy Access Coupler Lock # BD580409 - MaxxTow Coupler Latch Lock # MT76FR I have added some links below to video reviews for you to check out as well if you'd like to take a look.
    view full answer...
  • Coupler Latch Lock For Demco 2-5/16" EZ Latch Trailer Coupler
    The MaxxTow Coupler Latch Lock # MT76FR is our longest pin for locking the coupler. This pin is 3-5/8" of usable length along the pin. It is 1/4" diameter which is the typical lock size used on the Demco EZ latch couplers. The Snapper Pin, 3/8" x 2-1/2" # 38-212TR is our longest 3/8" pin.
    view full answer...
  • Can the MaxxTow Coupler Latch Lock Be Keyed Alike
    Since the MaxxTow Coupler Latch Lock for Surge Brake Actuators # MT76FR can not be keyed alike, what you're trying to do won't work, you'd get two different keys. However, the etrailer Surge Brake Coupler Lock # e98888 which has the same span and diameter as # MT76FR, can be keyed alike. To order these keyed alike, you'd need to just select the "keyed alike" option and you'll be all set.
    view full answer...


Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Michael B
Installed by:
Michael B
Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Carrie F
Updated by:
Carrie F
Employee Kristina F
Written by:
Kristina F
Employee Aidan B
Video by:
Aidan B

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