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Replacement Key for MasterLock Coupler Locks

Replacement Key for MasterLock Coupler Locks

Item # MLK1
Our Price: $13.85
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Replacement Key for MasterLock Coupler Locks Keys MLK1
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  • Reviews (21)
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Master Lock Accessories and Parts - MLK1

  • Trailer Coupler Locks
  • Keys
  • Master Lock


Fits:

  • Masterlock Trailer Coupler Locks (377DAT, 3774DAT, 378DAT and 379DAT)

Please type in key number above


MLK1 MasterLock Replacement Key for Coupler Locks






Customer Reviews

Replacement Key for MasterLock Coupler Locks - MLK1

Average Customer Rating:  4.9 out of 5 stars   (21 Customer Reviews)


by:

I lost the key to a four lock keyed-a -like set. No one could help me, even Masterlock with a reasonable cost replacement. Since I had the original key number I was able to locate the replacement with etrailer without taking out another mortgage or buying another complete set. It arrived and works perfectly!




by:

From the information off my key I was able to obtain a copy of my masterlock key. The product itself is great. I checked all keys and they worked without issue. The only problem I ran into was after placing my order I received notification that they were out of stock (and if I remember correctly it stated they were in stock on the site). It took nearly a month to receive it but they did communicate with me within a reasonable amount of time to let me know it was out of stock and when it's expected to be available with the option to cancel. So the company has great communication and the item worked well.




by:

Item is as described. I will not hesitate to purchase from etrailer.com in the future. Great customer support! Item was not in stock initially but etrailer kept me informed throughout the process.




by:

I ordered master lock keys and received a good product, outstanding customer service, and good follow through on tracking the order.




by:

Thank you so much for being able to help us with a difficult to find purchase. The customer service etrailer provided was outstanding. Thanks again.




by:

As old as these Master Locks were, they were able to get a pair of keys made for each.
It did take a couple of weeks to get them but I'm sure research had to be done to find the right cut. Everything works great.




by:

As old as these Master Locks were, they were able to get a pair of keys made for each.
It did take a couple of weeks to get them but I'm sure research had to be done to find the right cut. Everything works great.




by:

As old as these Master Locks were, they were able to get a pair of keys made for each.
It did take a couple of weeks to get them but I'm sure research had to be done to find the right cut. Everything works great.




by:

Works well. The fit inside the lock is a little tight compared to the key that came with the lock -- requires some persuasion to get this one in, but it does unlock the lock.




by:

I placed an order for replacment keys. They where delayed, which was no problem for me. But the staff called and emailed me on a regular basis to let me know 1) they where delayed 2) they had arrived 3) they had been shipped and 4) I should have received, which I had).
Thank you for everyone's excellent customer service. Its something that is missing in a lot of business, but not with this group of dedicated employees.




by:

Had a covid delay. Staff did great keeping me apprised of the status of my order. I recommend etrailer.




by:

The products are great the team is very prompt and helpful returns are a breeze love the customer service top notch for a online retailer




by:

Excellent service. My order took a while but the staff kept me updated along the way. Would use them again in a heartbeat.




by:

Great product and service as well




by:

Got my product when said it was key worked just fine




by:

Thank you! Key was delivered as promise d.




by:

These Keyes fit perfect.




by:

Very professional service.




by:

Just what I needed.




by:

All worked great




by:

Review from a similar MasterLock Replacement Key in Accessories and Parts


hard to find product but they found it



21
21

See what our Experts say about this Master Lock Accessories and Parts

  • Replacement Keys for Master Lock Padlock Keys A1397, 0579, and 10L759
    We certainly have replacement keys for your Master Lock padlocks! For your A1397 key, you will want to use part number # MLK1 and type in A1397 in the box. For 0579, you will also want to use # MLK1 and type 0579 in the box. For key 10L759, you will want to use # MLK27 and type 10L759 in the box.
    view full answer...
  • Replacement Key for Hitch Pin Lock Key Number 2054
    Without knowing what brand of lock you have, I was able to find that MasterLock has a key that has that number. For your replacement key, you will want to use part # MLK1. You will enter the key number in the box and then select the quantity of replacement keys needed. MasterLock does make locking hitch pins, so this is likely what you need.
    view full answer...
  • Replacement Key For Master Lock Coupler Lock
    For Master Lock Universal Coupler locks 377DAT, 3774DAT, 378DAT and 379DAT, the replacement key is # MLK1. You will need to enter your key number to get the replacement that will fit your lock. The key number is not stamped on the lock, so if you do not know the number on your lost key, you will need to replace the lock. To remove the lock if it is on your coupler, you will need to drill out the lock core. If you purchase another lock, I recommend writing down the key number in a...
    view full answer...
    Image 1 for
  • Replacement Key For Master Lock
    We can absolutely help you with the replacement key you are looking for. The replacement key is # MLK1. On the product page you will need to enter the key number X2078 and we will ship you out the correct key. If you want more than one, just enter the number of keys you desire in the quantity box.
    view full answer...
  • Replacement Key for MasterLock Coupler
    The Replacement Key for MasterLock Coupler Locks # MLK1 allows you to enter the key number to get a replacement. If you don't know the key number and lost your only remaining key then you will need to either replace the coupler or you will need to call a locksmith.
    view full answer...
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  • Ordering Replacement Key for Master Lock Pad Lock
    To order a replacement Master Lock key you'll need the part # MLK1 you mentioned. On the product page you'd need to enter the key number you need and we'll ship you out the key. The only place the key number is listed is on the key though so hopefully you wrote it down.
    view full answer...
  • Replacement Master Lock Key For Trailer Hitch Lock
    We do have a replacement key for your MasterLock trailer hitch lock. The Replacement Key for MasterLock Coupler Locks # MLK1 is a universal replacement key, all you need to do is type your key number into the "Key Number" box, and a replacement will be sent to you.
    view full answer...
    Image 1 for
  • Replacement Key for Master Lock Laminated Steel Padlock # ML1KA
    I went out to the warehouse and looked at some of our Master Lock Laminated Steel Padlocks # ML1KA which look like the one in your picture. None of them had a lock number stamped on them like the one in your picture does. If you are needing a key for a Padlock # ML1KA you will need go to with part # MLK1. When ordering a replacement key with part # MLK1 you will want to type the number on your key into the "Key Number" section. You will want to type in the number that is found on the key,...
    view full answer...
    Image 1 for
  • Replacement Key for Master Lock Trailer Coupler Lock
    We do have replacement keys available for your Master Lock Trailer Coupler Lock # 377DAT with part # MLK1, however you will need to know the key number that you are needing. If you can find this number, you will simply enter it into the textbox below the product information for the correct replacement. If you cannot locate the key number, unfortunately there is no way to determine what key you will need for the lock. The Master Lock Coupler Locks are not rekeyable so your only option...
    view full answer...
  • Replacement Key Recommendation for Master Lock # 377DAT
    For the coupler lock part # 377DAT we have replacement keys as part # MLK1. You'll need to know the key number and enter it on the product page for the key.
    view full answer...
  • Replacement Key for Master Lock Universal Trailer Coupler Lock 379DAT with Key Code 2434
    The Master Lock Universal Trailer Coupler Lock # 379DAT does not allow us to specify key codes or lock cylinders and does not come with a keyed alike option. Additional keys are available for whatever lock cylinder you get using the Replacement Key for MasterLock Coupler Locks # MLK1 and entering the key number then the quantity desired.
    view full answer...
  • Replacement Key Recommendation for Masterlock Coupler Lock Set 2848DAT
    It looks like the part # MLK1 is the correct replacement key part number you would need for the part # 2848DAT. On the product page you would need to enter the key number you need and we will ship you out the correct key.
    view full answer...
  • Replacement Key Availability for Masterlock Coupler Lock 379DAT
    For your trailer tongue lock part # 379DAT the correct part number for a replacement key is the part # MLK1. But you will need to know what key number you need. If you do not know what key number is needed there is no way to know.
    view full answer...
  • Replacement Key for Master Lock Coupler Lock
    If you have a MasterLock Coupler Lock like # 377DAT the replacement key is # MLK1. You will need the key number which is stamped on the original keys, it is not stamped on the lock. Unfortunately, if you do not have that number you will need to replace the lock. If the lock is currently locked on your trailer you can drill out the lock cores to remove it.
    view full answer...
  • Can the Master Lock Trailer Coupler Lock # 377DAT be Rekeyed
    The Master Lock Coupler Lock, # 377DAT, is not rekeyable. Master Lock does not offer replacement lock cores for this particular lock. If you know the key number that was stamped on the original keys, you can order replacement keys using the Replacement Key for Master Lock Coupler Locks, # MLK1. If you do not have the original keys and the lock is stuck on your trailer, you can drill out the lock core to remove the lock, but you would need a new coupler lock to secure the trailer. If you...
    view full answer...
    Image 1 for
  • Replacement Key for Master Lock Hitch Receiver and Coupler Lock Set
    The Master Lock Hitch Receiver and Coupler Latch Lock Set - Padlock - 1-1/4" and 2" Hitches # 2848DAT has replacement keys if you know the key number using # MLK1. If you do not know your key number, unfortunately there is no way to determine the replacement key needed. You can either drill out your locks to remove them and then replace your locks or you can have a local locksmith help you with forming a new key from your lock cylinder.
    view full answer...
  • Replacement Key for Masterlock Coupler Lock # 377DAT
    For the coupler lock you have part # 377DAT we have replacement keys as part # MLK1. You'll need to know the key number and enter it on the product page and we'll ship you out the correct replacement.
    view full answer...
  • How To Find A Replacement Key For A Master Locking Hitch Pin
    For your Master Lock hitch pin, like the Master Lock Hitch Receiver and Coupler Latch Lock Set # 2848DAT, you can use the: -Replacement Key for MasterLock Coupler Locks # MLK1. All you'll need to do is type in your key number in the box, and you'll be good to go. Attached is an image for you to check out, showing you where you can find this.
    view full answer...
    Image 1 for
  • Key Replacement for ML389 DAT
    You would need the part # MLK1. On the product page you would then need to enter the key number you need and we will ship you out the correct key.
    view full answer...
  • Replacement Key for Master Lock ML389DAT Trailer Coupler Lock
    To obtain a replacement key, you'll need to know the 4 digit code that was stamped on the key. You'd use part # MLK1. On the product page, near the 'add to cart' button, you'd need to type in the 4 digit key number.
    view full answer...
    Image 1 for
  • Where to Find a Replacement Key and the Number for a Master Lock Trailer Coupler Lock
    The Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers, part # ML389DAT, would not have the key number printed on the package since they put random ones in each package (printing on the package would make it easier for others to find out your key number). As such, to determine the key number for use with # MLK1, you will need to look at the physical key itself as those are the only place where the number is printed. If you have completely lost your set of keys (and...
    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...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C

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