bing tracking image
  1. Trailer Coupler Locks
  2. Master Lock
  3. Latch Lock
  4. Keyed Unique
  5. Stainless Steel
  6. 5/8 Inch Span
  7. 1 Inch Span
  8. 2 Inch Span
Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

Item # 2847DAT
Our Price: $9.79
Trailer Coupler Locks
Shipping Weight: 0.3 lbs
Add to cart
In Stock
Master Lock 5/8 Inch Span,1 Inch Span,2 Inch Span Trailer Coupler Locks - 2847DAT
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank. Great Prices for the best trailer coupler locks from Master Lock. Master Lock Adjustable Trailer Coupler Lock - Stainless Steel part number 2847DAT can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (87)
  • Q & A (0)
  • Videos (2)
  • Photos

Master Lock Trailer Coupler Locks - 2847DAT

  • Latch Lock
  • Keyed Unique
  • Stainless Steel
  • 5/8 Inch Span
  • 1 Inch Span
  • 2 Inch Span
  • Master Lock
  • Universal Application Lock

Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.


Features:

  • Stainless steel prevents rust and corrosion
  • 4-Pin tumbler lock resists picking
  • Usable length: 3-3/16"
  • 1/4" Diameter pin fits coupler latches with the following widths:
    • 5/8" - Most standard couplers
    • 1" - Most 2-5/16" ball couplers
    • 2" - Most wide latch couplers such as Atwood, Titan, and more
  • Limited lifetime warranty


2847DAT Master Lock Adjustable Trailer Coupler Lock - Stainless Steel





Video of Master Lock Adjustable Trailer Coupler Lock - Stainless Steel

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




Video Transcript for Master Lock Trailer Coupler Locks - Latch Lock - 2847DAT Review

Demo-master-lock-locks-2847dat Today were doing a review of the Master Lock Adjustable Trailer Lock part number 2837 DAT. This lock comes with all stainless steel parts to prevent rust and corrosion. The pin has a built in notches to walk around the barrel lock. The pin diameter is a quarter inch. It will fit the 5/8 standard couplers and from one inch to 2-5/16 ball couplers. The lock works like this; simple take our pin, run it through our coupler latch and we will take the barrel lock and slide it on.

Well lock it into position, remove one of our two keys and put our cover over the barrel lock. And there you have it for the Stainless Steel Master Lock Adjustable Trailer Coupler lock part number 2847 DAT.

Customer Satisfaction Score:


Customer Reviews

Master Lock Adjustable Trailer Coupler Lock - Stainless Steel - 2847DAT

Average Customer Rating:  4.7 out of 5 stars   (87 Customer Reviews)

Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.

by:

I purchased this lock for a way to keep people honest while my trailer was attached to my truck . Knowing the lock is cheap and Master Lock brand, disappointingly the lock itself traps moisture inside even with the cap closed and facing downwards - a bit of silicone around the cap would help. Because of the moisture, it’s has corroded a bit inside making the key almost impossible to insert. I’ve had to soak the lock with WD40 to help the key go in. It still mostly works but I wouldn’t recommend it. The problem is there’s not many cheap alternatives to lock the latch while your trailer is attached to your vehicle. Skip this and find another option.



by:

Better than nothing . Should slow down the bad guys if they want to try & steal the trailer . They better be faster than the 9MM !



by:

Product is just as described and very reasonable in price. Shipping was also very quick. Thanks!



by:

Called to order another lock because I liked the one so much I had gotten earlier in the week. Customer Service was awesome. Information was gathered by the rep. that helped me with my decision. I'll come back again for all of my trailer needs.



by:

Great little item does the job. If I had one issue. The key gets stiff to turn I'm not sure if it's going to jam at some point which is a shame because I really like it.



by:

Works well for what it is, keeps tongue engaged and provides minor deterrence to thieves, adjustable rungs allow for many widths and configurations to secure tongue lock. I use one on all my trailers which are all a bit different. This one is adaptable.



by:

Excellent deterrent for thieves. Works on a multitude of trailers.



by:

stainless and easy to use



by:

I usually store my Anderson hitch drawbar in the coupler. I had a Bulldog installed on my Airstream (well worth the $500 it cost). I use this lock when among friends to prevent them from dropping the Anderson on a foot if they are curious about the Bulldog. This lock would not deter a thief.



by:

great lock



by:

i worked good with my trailer and it fits perfect



by:

Went the extra mile to find what I need ed!



by:

The lock worked very well. It fit perfectly into the existing hitch pin hole. The variable length on the lock shaft allowed me to snug up the lock to the hitch mechanism which I think will make it more difficult for any thief to cut or remove the lock. The key operation was simple and easy. I use the lock pin when my trailer is attached to my vehicle and also when it is not attached so as to serve as a secondary trailer coupler lock and not allow the coupler to be opened for thieves to insert their ball hitch and steal the trailer and boat. Great product.



by:

Ordered product for my Tab Travel Trailer and it turned out I ordered the wrong item They gladly refunded the mistake and sent my the right one. I had called and they guided me to the correct product. Very happy...vann

Vann A.

3/16/2018

I’m a happy customer….Thank you



by:

As usual when dealing with etrailer, everything came in as advertised! Great people to deal with!



by:

great lock



by:

I purchased a pin type trailer coupler lock and a ball type coupler lock. Both work well and were easy to install. Of the many products available from etrailer, it was easy to find what I needed. It was shipped the same day as ordered and arrived quickly. As a first time customer, I am very pleased with the results. I will shop at etrailer.com for future needs and wants. As a matter of fact, I had a product question quickly answered by etrailer experts and ordered the suggested item today. I give etrailer 5 1/2 stars!



by:

Easy ordering process!
Fast shipping!
Product
as described.
Installed easily and seems to be a quality product .
Feels very solid.
Installed on my gearspace 34 cargo carrier.
Great price!



by:

Johnathon was my sales rep that I dealt with when I had questions. He was great and he kept track of my order and when the trailer hitch was not available from the manufacturer until late March, he helped me choose another one and sent it to me with the freight free of charge. It took only two days to arrive and I am very happy with the hitch and wiring harness. Highly recommend.



by:

I don't rate this product very high since the Master Lock assembly is poorly built. I believe it would not take a thief long to break the lock and just pull the pin out. The lock is even hard to operate with the key. Not recommended
I am using this product with the coupler lock I purchased. I am thinking if its worth the hassle to send it back.



by:

I believe it will be functional as it is advertised, but I does not appear to be as well build as most Master Lock products have purchase before. I does fit my trailer hitch that is was ordered for.



by:

Exactly what I needed!



by:

Had to drill out the whole in the trailer latch to make this product fit
It is exactly what I wanted. Now my trailer is safe from theft and uncoupling.



by:

I placed the order on a Saturday and it was filled on Sunday, the next day!! I received the order today - Wednesday via UPS. I wish everyone took the same responsibility to provide the utmost in customer service as E-trailer has. When I need any further trailer parts they will be my first and only location I will order from!!

Ron



by:

Love this product. The stainless steel is a key feature (no pun intended)

Jimmy

6/17/2021

Still kicking


25
87
Show More Reviews

See what our Experts say about this Master Lock Trailer Coupler Locks

  • Is the Pin For The Master Lock Coupler Lock # 2847DAT Available Separately?
    Currently Master Lock only offers their Adjustable Trailer Coupler Lock # 2847DAT as a set and the pin is not available separately. You would need to get a whole new lock with the pin but you can transfer your current lock since it will not be keyed the same as any other master locks you may already have.
    view full answer...
  • 5/8 inch Diameter Coupler Lock Recommendation
    Nearly everyone of our coupler locks have a pin diameter of 1/4 inch. The Masterlock Lock part # 2847DAT happens to be 5/8 of an inch in diameter.
    view full answer...
  • What Are the Dimensions of the Master Lock Coupler Lock, Part # 2847DAT
    The pin of the Master Lock Coupler Lock, part # 2847DAT is 4 inches long. The pin has detents that allow it to fit latches up to 2 inches wide. The end cap is constructed of high impact plastic, and there is a metal button underneath that will prevent the pin from passing through the coupler latch if the plastic cap is removed.
    view full answer...
  • What Size Coupler Latches are Compatible with the Master Lock Adjustable Trailer Coupler Lock
    The Master Lock Adjustable Trailer Coupler Lock, # 2847DAT, is designed to fit coupler latch widths from 5/8 inches up to 2 inches wide. In all likelihood, it will fit your coupler. I recommend measuring to make sure. If you get a width that is less than 2 inches and has a hole for a lock that is 1/4 inches or less in diameter, this lock will fit. I have included a link to a video review of this lock for you. I have also included a link to all of the coupler locks we carry.
    view full answer...
  • Is There a 3/8" Pin for a Coupler Latch Lock
    The pins used in the latch hole on a trailer coupler are not actually holding anything together. They are simply an anti-theft mechanism which stops anyone from being able to open the latch and either uncoupling or coupling the trailer with the pin left installed. I supposed they could also be looked at as a fail safe while out on the road as well. That said, the pins are all 1/4" so I think the manufacturer may have confused that part. I recommend the Master Lock Hitch Receiver and Coupler...
    view full answer...
  • How Tight Will Master Lock Universal Trailer Coupler Lock # 379DAT Fit on 2-5/16 Inch Demco Coupler
    The Master Lock Universal Trailer Coupler Lock, part # 379DAT, is designed to work on all three hitch ball sizes, 1-7/8 inch, 2-inch, and 2-5/16 inches. Since it fits all three sizes it will not be able to be very tight, but you will want to make sure to slide the body of the lock up against the coupler as far as possible when attaching the lock to the coupler. As long as the lock cannot be removed after you lock it to the coupler it will work just fine in keeping somebody from connecting...
    view full answer...
  • Can an Additional Latch Lock Keyed to Match Lock Set 3784DAT be Ordered
    We may be able to accommodate you. You would need lock # 2847DAT. To get it keyed the same as lock set # 3784DAT we would physically have to pull the matching one from inventory. There is no guarantee that we will have that number in stock. But in order to start the ball rolling you will need to call customer service at 800-298-8924 and explain that you need # 2847DAT keyed to match the # 3784DAT lock set you already have.
    view full answer...
  • Should Adding a Padlock to a Yoke Style Coupler Keep the Coupler from Coming Off of the Tow Vehicle
    I only had one photo of yours come through so it is a little hard to tell but you should be able to add your padlock style coupler lock, like the Master Lock # 605DAT, to keep your coupler from opening. Attached is a review video of the discontinued Atwood Yoke style coupler AT80072 where you can see that the padlock would attach to. I'm guessing you've already tried attaching the lock and you are still able to open up the coupler with the trailer coupled to your tow vehicle? If that is...
    view full answer...
    Image 1 for
  • Coupler Lock for Buyers Products Straight Tongue Trailer Coupler # 3370091562
    Since the snapper pin of the Buyers Products coupler part # 3370091562 is 1/4 inch diameter and 1-3/4 inch in usable length the correct size lock would be the Master Lock part # 2847DAT which is correct diameter and can be set at a 2 inch length which would work great.
    view full answer...
  • Stainless Steel Trailer Coupler Pin with 1/4 Inch Diameter
    The 1/4 inch diameter snapper pins we have are all regular steel. For a stainless steel 1/4 inch diameter pin take a look at the locking pin # 2847DAT. I have included a link to a video review for you. You will get the stainless steel construction you are after plus the added security of a lock.
    view full answer...
  • Trailer Coupler Lock Solution for Coupler that is 4-5/8 inches Wide
    It looks like would need to get a latch coupler lock like a Master Lock Adjustable Trailer Coupler Lock - Stainless Steel, part # 2847DAT, for your trailer that has a flange width of 4-5/8 inches. I attached a link to a review video of this coupler lock for you to check out. We do not have a surround coupler lock that will be wide enough to fit on a coupler that has a distance of your trailer.
    view full answer...
  • Need Replacement Keys for Trailer Locks 377DAT and 2487DAT
    It sounds like you have a MasterLock Trailer Coupler Lock # 377DAT and a Master Lock Adjustable Trailer Coupler Lock # 2847DAT . In order to determine which keys you need, you are going to need the number that was stamped on the original keys and not the numbers from the locks. Unfortunately that is the only way to get replacement keys for these two locks. If you wanted to replace them with new locks, you could go with the exact same models as replacements. If you have the numbers off...
    view full answer...
  • Replacement Coupler Trigger Latch for 5/16" Diameter Latch Hole
    If you've got a 5/16" diameter hole, those are usually on coupler latches, so it sounds like the Master Lock Adjustable Trailer Coupler Lock - Stainless Steel # 2847DAT is what you're looking for. This lock has a 1/4" pin and is designed for 5/16" latch holes, so it will fit your application. This lock is made from stainless steel so it's not going to rust when exposed to the elements, and the dust cap will keep moisture out of the locking mechanism. I've linked a short video review of...
    view full answer...
  • Recommended 3 Inch Locking Hitch Pin For Boatmate Tandem Trailer
    We do have a locking hitch pin that may work very well for you. I recommend the Trailer Coupler Lock, part # e98888. This is a 1/4 inch diameter pin that has a 3-3/8 inch span. This lock has a covered key slot that will help prevent corrosion. I have attached a product review video you can check out. The pin on the Master Lock Coupler Lock, part # 2847DAT you referenced is 4 inches long but is designed to fit latches up to 2 inches wide. It would not work in the 3 inch span you said you need.
    view full answer...
  • Can Master Lock Adjustable Trailer Coupler Locks be Keyed Alike?
    Though we do have many coupler locks which can be keyed alike, unfortunately the Master Lock Adjustable Trailer Coupler Lock, # 2847DAT, is not one of them. There is an adjustable coupler lock which offers plenty of convenience in the BOLT Trailer Coupler Lock, # BL7025289. This lock can be coded to the ignition key of your 2004 Toyota Tundra so you do not have to carry any extra keys. I have added a link to a review of this lock, as well as the link to our page displaying each of our...
    view full answer...
  • Pin or Lock Recommendation for a Yoke Latch Coupler
    It sounds like you are talking about a latch pin which would go through the latch and prevent it from opening. It isn't a necessary part but usually what people do with the latch holes is use a latch lock. I recommend Master Lock Adjustable Trailer Coupler Lock - Stainless Steel Item # 2847DAT because it is adjustable to fit latches with different widths from 5/8 inch wide to 2 inch wide. The pin has a 1/4 inch diameter which is the most common latch hole size. I have linked a video review...
    view full answer...
  • Trailer Lock Recommendation for Gooseneck Trailer with Atwood Coupler
    Since the Atwood AMPlock gooseneck coupler locks are no longer around your best option for a coupler lock will be a wheel lock to lock the trailer like the etrailer.com wheel lock part # 288-02020. This locks the trailer just as effectively as a coupler lock but is universal enough to fit basically any trailer out there or vehicle. It's the best solution for gooseneck trailers like yours where there isn't a coupler lock that fits the coupler.
    view full answer...
  • Will Masterlock Coupler Lock Fit Demco EZ Latch Surge Actuator
    Yes, since the Masterlock coupler latch lock part # 2847DAT has a 1/4 inch diameter and has a usable span of up to 2-3/4 inches it would fit and work well on the Demco EZ latch style of surge actuator # DM8164311. I attached a review video for this lock for you to check out as well.
    view full answer...
  • Replacement Lock for a GearSpace 34 Enclosed Cargo Carrier
    For your GearSpace 34 Enclosed Cargo Carrier for 2" Hitch # HGK826 you're going to want the Master Lock Adjustable Trailer Coupler Lock - Stainless Steel # 2847DAT.
    view full answer...
  • Can Master Lock Trailer Coupler Locks be Keyed Alike?
    The Master Lock Adjustable Trailer Coupler Lock - Stainless Steel # 2847DAT is not offered in a keyed alike option, so if you order 3 you will have 3 separate keys. If you want locks that are keyed alike, I recommend the etrailer.com Stainless Steel Trailer Coupler Lock - 7/8" Span # e98890 which you can select keyed alike from the drop down box after selecting your quantity desired. I've attached the link to all your keyed alike options.
    view full answer...
  • Locking Titan Zinc-Plated Straight Tongue Coupler T4853100 to Hitch Ball
    Yes, to secure/lock the Titan Zinc-Plated Straight-Tongue Coupler # T4853100 to the hitch ball you can use a latch lock like the excellent Master Lock # 2847DAT. This will insert through the existing holes on the latch to prevent it from pulling up and unlocking from the ball. It features a 4-Pin tumbler lock that discourages picking and the stainless steel shank will resist any rust or corrosion. I have attached a short video demonstration that you can check out as well.
    view full answer...
  • Coupler Lock Recommendation for a Bulldog Cast Coupler # BD4425000317
    I went out to the warehouse and pulled a Bulldog trailer coupler, # BD4425000317, to determine what the best lock for it would be. The best option would be a simple latch lock like # 2847DAT. This will prevent the latch from opening. I have included a link to a video review of the lock for you.
    view full answer...
  • Pin Lock for Yoke Style Trailer Coupler
    The Master Lock Adjustable Trailer Coupler Lock # 2847DAT is a great lock to use to lock the yoke style coupler you sent in a picture of. I attached a picture of it used to lock a coupler just like yours for you to check out as well.
    view full answer...
    Image 1 for
  • Coupler Lock for 2016 Airstream International
    I reviewed the specs for the Airstream International travel trailers and while they appear to have a standard latch coupler, the one I saw in photos does appear to have a curved lip which could potentially interfere with some coupler locks. No coupler dimensions are provided on the Airstream site. The lock you referenced, Atwood AMPlock Underslung Coupler Lock AT89006, will fit couplers up to 4-5/8-inches wide including the lip. Since you cannot measure your coupler you may prefer using...
    view full answer...

Do you have a question about this Trailer Coupler Lock?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Brian B
Updated by:
Brian B
Employee Wilson B
Updated by:
Wilson B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.