DeadBolt Adjustable Trailer Coupler Latch Lock w/ 9/32" Diameter Pin

DeadBolt Adjustable Trailer Coupler Latch Lock w/ 9/32" Diameter Pin

Item # RC1

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DeadBolt Trailer Coupler Locks - RC1
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Product Images


  • Latch Lock
  • DeadBolt
  • Keyed Unique
  • Universal Application Lock
  • 1/2 Inch Span
  • 1 Inch Span
  • 1-1/2 Inch Span
  • 2 Inch Span
  • 2-1/2 Inch Span
This swivel-head, side-entry lock fits a wide variety of lever-style couplers and has five locking positions from 1/2" to 2-1/2". Features a 9/32" diameter pin, all-weather grips, and a weatherproof sealed lock housing. Lowest Prices for the best trailer coupler locks from DeadBolt. DeadBolt Adjustable Trailer Coupler Latch Lock w/ 9/32" Diameter Pin part number RC1 can be ordered online at or call 800-298-8924 for expert service.

  • All Info
  • Reviews (16)
  • Q & A (6)
  • Videos (1)
  • Photos
  • Why etrailer?

DeadBolt Trailer Coupler Locks - RC1

This swivel-head, side-entry lock fits a wide variety of lever-style couplers and has five locking positions from 1/2" to 2-1/2". Features a 9/32" diameter pin, all-weather grips, and a weatherproof sealed lock housing.


  • Coupler lock secures the trigger latch on your trailer's coupler to deter theft
    • Trailer can't be removed from your tow vehicle when locked onto ball
    • Would-be thieves can't secure your unhitched trailer to their tow vehicle
  • Swivel-head, side-entry lock housing adjusts to 5 different lengths for easy, convenient use
    • Great for RAM coupler (or other ball coupler that requires a lock with a longer span)
  • Tamper-resistant design
    • Conical shaped housing ensures tight fit against coupler latch
    • Patented, pick-proof screw-and-lock mechanism provides security
  • Rust-resistant, double-chrome finish on lock housing
  • All Weather Grips make lock easy to handle and operate
  • Plastic cap covers key slot to help prevent corrosion in lock
  • 2 Reversible, automotive-style keys included
  • Made in the USA


  • Application: trigger-latch-style (or lever-latch-style) ball couplers
  • Inside pin length (span): 1/2", 1", 1-1/2", 2", or 2-1/2"
  • Pin diameter: 9/32"
  • Overall length: 4-5/8"
  • 1-Year warranty

RC1 CT Johnson Dead Bolt Adjustable Trailer Coupler Latch Lock with 9/32" Diameter Pin

California residents: click here

Video of DeadBolt Adjustable Trailer Coupler Latch Lock w/ 9/32" Diameter Pin

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

Video Transcript for DeadBolt Trailer Coupler Locks - Latch Lock - RC1 Review

Today we're going to be taking a look at part number RC1. This is the deadbolt adjustable trailer cover latch lock. The diameter of the pins are going to measure 9/32 of an inch. Now this coupler lock is going secure the latch on your trailer's coupler. That's going help deter and prevent theft. What that means is that the trailer cannot be removed from your inaudible 00:00:17 vehicle when the lock is installed.

And would be thieves cannot secure your unhitched or unattended trailer to their tow vehicle or to their set up with this installed. It's going to feature a swivel-head design. You're going to have two automotive style keys. And the lock will adjust to five different positions for easy, convenient use. So this is going to be your furthest out position. In this position the units going to give us an overall length of about 5 inches.

So that's going to be at the widest point, that's with the lock body all the way out. So, if we're working with trailer couplers that have a smaller span or a smaller latch, we can just push it in to the next location, so, that's position 5, this is position four, three, two, and one. So, it's going to offer five different positions along the pin. This unit is great, especially if you have multiple couplers or different size couplers that you're working with. Again, you've got that swivel head design, so it's got the nice entry lock housing. It can swivel all around so you can always gain access to it.

And this unit's going to be great for ball couplers that require a lock with a longer spin. It's going to feature a nice, tamper resistant design. The housing is going to ensure a nice, tight fit against a coupler latch and then the lock mechanism is going to provide additional security. It's got a nice patented design so that way it makes it very, very difficult for somebody to come up and try to pick the lock and remove it from your setup. Now, this unit going to be made from a rust resistant double chrome finish on the lock housing. Solid construction with a double chrome finish.

So, it's really going to stand up well against rust and corrosion. Again, the double chrome finish is here on the lock housing. Looks like here on the pin it's just a nice finish steel, maybe a stainless steel construction and a very strong drill inaudible 00:02:12. We got a nice textured grip on this side right here. And then on the lock housing we've got nice rubberized grip that's going to allow us to get a secure hold on it when we're operating the lock. It's also got a nice dust cap on it that protects the lock hole. That's going to keep out any dirt or moisture, which is going to extend the life or our lock core. The product is made in the USA. It's designed for trigger latch style or lever latch style ball couplers. Now with it in the outermost position, which would be this position right here, our span link, or usable pin link, that would be measuring from this point here to this point here, that's going to measure 2 5/8 of an inch. We push it in to the next position, that's going to decrease to 2 1/8 of a inch. Next position, gives us a usable pin length of 1 5/8 of an inch, and then we have 1 1/8 of an inch, and then we have 5/8 of an inch. Again, the pin diameters measure 9/32 of an inch. I want to show you how this works. I've got a coupler here today. So, you can see here on our coupler we have a lever latch or a trigger latch style. What I would do is I would place my pin through this up here, then I would take my lock bobby, place it on and with the key in the lock position, it's just going to go down to the closest position where it engages and then we can simply just remove our key, place on the dust cap. Now, with that installed, we cannot open up that lever and so our mechanism does not open up. Now on this ball mount or, excuse me, this coupler, we also have another position right here. This is going to have a span of about 2 1/2 inches. So, we can place our pin through there because this is a versatile pin, it's going to work on almost any coupler out there, and then we can place on our lock, move it to a lock position and we're set to go. So, it's a really nice to design, again, very versatile. It's going to apply to a lot of a different couplers out there on the market. And that's going to complete today's review of part number RC1. This is the dead bolt adjustable trailer coupler latch lock. .

Customer Reviews

DeadBolt Adjustable Trailer Coupler Latch Lock w/ 9/32" Diameter Pin - RC1

Average Customer Rating:  4.6 out of 5 stars   (16 Customer Reviews)

This swivel-head, side-entry lock fits a wide variety of lever-style couplers and has five locking positions from 1/2" to 2-1/2". Features a 9/32" diameter pin, all-weather grips, and a weatherproof sealed lock housing.

- RC1

Unable to insert key after a few used, two weeks. 609368


Try giving the key slot a shot of air tool oil a few times. Its thin enough that it flows well and wont get too sticky and attract a lot of dirt. That should loosen things up and allow the lock to operate.

-- Mike L - 03/01/2019


- RC1

Worked perfectly. Came ahead of time. Thanks. 401375


No change. All is well.

Richard H - 07/03/2018


- RC1

Great lock,works great for locking down my clamshell trailer top. Very happy with this purchase 342664

- RC1

I ended up switching to a set of BOLT products instead. So it could be keyed to my ignition key. 351643

- RC1

Great to have a piece of mind when away from my cargo trailer. 574256

- RC1

It was great to be able to easily find and order a replacement part for my trailer lock. I was worried I'd need to replace the entire device, but etrailer already had me covered. Reasonable price and quick service- couldn't be happier! 542502

- RC1

It works! Tried two other trailer coupler latch locks - DeadBolt RC6SS and a Master Lock - that just wouldn't fit. The RC1 goes right through the coupler latch and locks tight due to the narrower design of the conical shaped pin and lock housing contact. etrailer even provided a keyed alike option to match the rest of my DeadBolt locks for a small surcharge. DeadBolt makes most of their locks in the USA but lists the RC1 as "assembled in USA" (etrailer says it is made in the USA). Looks great but wish they were available in stainless steel. 256772

- RC1

Well made DeadBolt Adjustable Trailer Coupler Latch Lock. This is a better quality than is usually found in hardware and trailer accessory stores. It has always been easy to open with the provided key and has never stuck or seized up. 665231

- RC1

Received the lock, looks and works as expected, no problems so far. 609257

- RC1

A solid lock and several adjustable sizes. Seems well made with smooth mechanics. 581873

- RC1

After a year, still works great 576888

- RC1

Customer service is top notch. Shipping was fast. Product is as described. No hesitation at all to order from again. Great people to work with. Even called me to let me know my order was on the way 481651

- RC1

Very good quality. 471316

- RC1

These are great little locking devices to add extra security to your trailer. I will likely buy more soon! Thank you! If you ever get ones with combination locks that would be great as my key ring is full of keys! 443630

- RC1

Ordered trailer tongue lock, shipment was fast and product met all of my needs. Recommend anyone needing trailer parts or accessories to use etrailer.. Mark B. Zephyrhills, FL 307273

- RC1

Received this lock along with a trailer hitch lock. Works on my trailer. Arrived as expected and would order again. 292386


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Info for this part was:

Installed by:
Jeff D
Expert Research:
Jameson C
Written by:
Laura H
Installed by:
Cole B
Photos by:
Sam P
Updated by:
Sarah W
Updated by:
Erin H

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