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  1. Trailer Coupler Locks
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  6. 3-3/8 Inch Span
etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome

etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome

Item # e98888
Our Price: $17.04
Trailer Coupler Locks
Shipping Weight: 0.55 lbs
In Stock
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Designed primarily for brake actuators that lock through the body, this lock has a covered keyhole and chrome plating to help prevent corrosion. Steel construction ensures long-lasting dependability. Can be keyed alike to match other etrailer locks. Great Prices for the best trailer coupler locks from etrailer. etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome part number e98888 can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (266)
  • Q & A (0)
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  • Why etrailer?

etrailer Trailer Coupler Locks - e98888

  • Latch Lock
  • Keyed Alike
  • etrailer
  • Universal Application Lock
  • 3-3/8 Inch Span

Designed primarily for brake actuators that lock through the body, this lock has a covered keyhole and chrome plating to help prevent corrosion. Steel construction ensures long-lasting dependability. Can be keyed alike to match other etrailer locks.


  • Coupler lock secures the ball coupler of your trailer brake actuator 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 with the coupler locked either
  • Large span is ideal for trailer brake actuators that fit 2-5/16" balls
  • Tamper-resistant design
    • Conical shaped housing ensures tight fit against coupler latch
    • Pick-proof screw-and-lock mechanism provides security
  • Rubber end and textured lock core make it easy to grip lock
  • Plastic cap covers key slot to help prevent internal corrosion
  • Sturdy steel construction
  • Chrome finish resists rust and corrosion
  • 2 Reversible, automotive-style keys included
  • Locks can be keyed-alike to match other etrailer locks
    • Select "Keyed Alike" from drop down menu above and enter number of locks into Quantity box
  • Made in the USA


  • Application: surge brake couplers that lock through the body
  • Inside pin length (span): 3-3/8"
  • Overall length: 6-7/8"
  • Pin diameter: 1/4"
  • 1-Year warranty

etrailer Lock Compatibility


  • Lock can be keyed alike to match other etrailer locks.
  • To order keyed alike locks, select "Keyed Alike" from drop-down menu above and enter number of locks in Quantity box.

e98888 etrailer Trailer Coupler Lock for Surge Brake Couplers with 3-3/8" Span -Tow Ready 63213 - Rola 59104

Alternate part number: 28012

California residents: click here

Customer Satisfaction Score:

Customer Reviews

etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome - e98888

Average Customer Rating:  4.7 out of 5 stars   (266 Customer Reviews)

Designed primarily for brake actuators that lock through the body, this lock has a covered keyhole and chrome plating to help prevent corrosion. Steel construction ensures long-lasting dependability. Can be keyed alike to match other etrailer locks.


This steel lock mechanism will only keep an honest person away. I hit the lock with a hammer and it cracked off, rendering it useless. The key loxk has to be spun on, so if you keep the rubber protector in place its a pain to screw on with the key inserted. Get a reL trailer lock that goes in the ball mechanism. Do not wastevyoyr money on this styleock it is useless against and criminal intetent.

Any lock can be tampered with until it fails. Item # BLTL-50-40D
Blaylock EZ Lock Gooseneck Coupler Lock - Bulldog/Stallion/Superior/T.E.M. Gooseneck Couplers
would be a good option for you.
-- Etrailer Expert Sierra K - 05/24/2022


Perfect for the Demco EzLatch on my utility trailer. Very easy to use and provides the security for my trailer that I sought.

Works very well, and as intended. Adds a sense of real security & safety.
The D - 08/04/2021


Great product! I bought this coupler lock to replace others that kept bending while pulling my boat. After a year and fishing about once a week, pulling over mountains, and having to hit the brakes hard a couple of times, this coupler has held up superbly! etrailer is my go to place for all trailer products, great selection of products, super description of their products, often with video link, fantastic service and very competitive prices!

Super! Works as good today as the day I receivedit!
Edward M - 03/06/2022


Good value since the coupler lock works exactly as intended. Best part - even tho outside year around in Seattle weather, no corrosion since chrome plating more than adequate. Works on both electric and surge brake couplers with thru-body locks requiring extra length (span).


I was sent a follow up email asking how I liked the lock, and I have to say that I liked it enough to buy it a second time after I LOST THE KEYS!!! Because losing keys in my job!!! But yes it is a great lock for my trailer, because it has an odd coupler that a pin goes completely through it and you can’t use a standard padlock or coupler lock. The coupler locks sold at local stores were not long enough to go through the coupler, so I has to search the internet and I found this at and it works! I would definitely recommend this lock if you have this style of coupler.


Perfect for the newer Demco coupler. I had been looking for a way to secure the coupler and this worked perfectly. The bonus was being able to have it keyed the same as 2 smaller locks for other trailers.


Good lock for this different style coupler. Kind of an odd setup with the way it unscrews but works very well and should last a really long time with its simple design.


Works great in a Shorelandr trailer


I have broken 2 locking coupler locking pins due to tongue moving forward with surge brakes. This product is not an ideal solution as you need to spin on and off with the key to lock and unlock the pin. Turning a key 10-15 times to screw in and out is a pain. This will be a back up at best to some other solution I am still seeking.

You may like this product better as it is just one turn of a barrel key which makes it a little easier: Item # MT76FR
MaxxTow Coupler Latch Lock for Surge Brake Actuators - 3-5/8" Span - 1/4" Diameter
-- Etrailer Expert Sierra K - 12/01/2021


Just installed on trailer. Looks to be well made. Fit like a glove and keys worked well. We will see how well it holds up, my guess I think it will be fine.

Still going strong, no problems !!!!
Raymond - 04/17/2022


easy to use, appears strong and solid

no one has stolen my boat and i can still unlock it so i am very happy
Thomas - 11/10/2022


A little longer than what I was expecting and the process of unlocking is a bit tedious. You have to keeping spinning around unscrewing the lock from threads.


I just got off the phone with costumer service. The coupler just arrived with no key and no locking mechanism. Just the bar with the two ends. The end that is supposed to include the lock is hollow.
I received the new item to replace the defective one and the new was is complete.


These seem to be made well. Yet to be seen how they hold up over time. Having several trailers, the keyed alike feature was important to me and I was able to order the lengths I needed for the various coupler types. I saw some reviews indicating that the operation of these was slow or tedious. I found that insert the key, hold the key and spin the black end was simple and quick.


great people, service, all companies should do the same


A great locking system. I've tried many different ones before and this is the best I've found. Also reasonably priced and quality built.

This product is awesome. Would only buy this one when I need another lock for another trailer.
Danny - 03/30/2022


Well made and reasonable price with Fast shipping


I love it. Works perfectly. Though at times, I just wish I could shorten the length.

Its still right where I use it, working perfectly.
Allen - 07/17/2022


easy to install and works great


I bought this coupler lock, because my hitch was too wide for a standard coupler to work. It works fine and looks great. It is a pain to have to keep turning the key around and around to "unlock" the device from the hitch. From a theft or security perspective, it is awesome.


Bought multiple receiver locks and hitch locks, all keyed the same. Incredibly convenient to always use the same key no matter what vehicle or trailer you are using.


Worked perfect! After buying multiple locks and having them be too short, this one worked perfect. Always love etrailers customer service and prices. You can’t go wrong!


As advertised, works perfectly with my 2" DemcoEZ coupler.




Great solution for the RV and getting it keyed the same as the Hitch Receiver was nice.

Show More Reviews

See what our Experts say about this etrailer Trailer Coupler Locks

  • Can Brand e98888 Surge Coupler Lock Be Keyed Alike With Previously Purchased Lock
    It is possible to get the # e98888 lock keyed alike to the lock you previously purchased from us, but you'd need to place your order by phone with one of our Customer Service folks. You can reach them at 800-298-8924. I've linked to a product demonstration video featuring the # e98888 lock you mentioned.
    view full answer...
  • Recommended Coupler Lock For Trailer With A 3" Span
    We have exactly what you are looking for. I recommend the etrailer Surge Brake Coupler Lock # e98888 which has a 3-3/8" span which will work perfectly to lock your coupler when it is attached to a hitch ball, or even when it is not. The # e98888 has a chrome finish making it corrosion resistant, and the tamper proof design will keep your trailer secure. I included a video of the # e98888 for you to take a look at.
    view full answer...
  • Dimensions of etrailer Lock for Surge Brake Trailer Couplers
    The Lock for Surge Brake Trailer Couplers, part # e98888, should work for your trailer hitch. This product has a center span of 3-3/8 inches and a pin diameter of 1/4-inch. The center span is the space between the two black end pieces. Since you need 3 inches of pin length this part should work just fine as it provides 3-3/8 inches. It has an overall tip-to-tip length of 6-3/4 inches. This part is available in keyed-alike multiples if required.
    view full answer...
  • Will Trailer Coupler Lock # e98888 Secure Boatmate Trailer with Surge Brakes
    We do have a locking hitch pin that may work very well for you. I recommend our 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.
    view full answer...
  • Coupler Lock for Titan Aero 7500 Actuator Coupler
    You will need to use a coupler lock in place of the included pin in the handle of actuator T4606500 to lock it. Latch lock # e98888 will work. It has a 3-3/8 inch span. Once inserted and locked the handle would not be able to be pulled up to release the trailer from the ball on the tow vehicle.
    view full answer...
  • Recommended Hitch Pin Lock For UFP A-60 Coupler
    The coupler lock I recommend for your UFP A-60 Coupler is the Coupler Lock, part # e98888. Since the coupler measures 3-inches wide and the pin hole is 1/4 inch diameter the # 28012 will work great to secure the coupler. The lock has a covered key slot to keep dirt and helps prevent corrosion. This is a keyed-alike item so if you want more than one lock and need them all to use the same key you can use the drop-down box on the product page when ordering.
    view full answer...
  • Trailer Coupler Lock with Pin Length of At Least 3 Inches
    The closest option we have available to what you are seeking is our Coupler Lock # e98888. This coupler lock does feature a 3-3/8 inch usable span but the pin itself has a 1/4 inch diameter. This diameter is just a tad smaller than what you are looking for but it will still work on your coupler to either lock the trailer to the hitch ball when you're towing or to help deter theft when the trailer's left unattended. I have attached a short video review that you can check out...
    view full answer...
  • Trailer Coupler Lock e98888 Material
    The Trailer Coupler Lock # e98888 is made from stainless steel. I attached a review video link for this for you to check out as well.
    view full answer...
  • Pin Lock To Secure Bulldog Collar Lok Coupler to Hitch Ball
    Which specific Bulldog coupler do you have? Does it have a latch with a pin in it by chance?
    view full answer...
  • Availability of Longer Hitch Pin Lock for Master Tow Dolly
    Sounds like you need a longer hitch pin like the part # e98888 which is a 1/4 inch diameter pin lock that is 3-3/8 inches in length.
    view full answer...
  • Difference Between Keyed Alike and Keyed Unique on DeadBolt Coupler Lock
    When looking at our Coupler Lock # e98888, or any of our locks, "Keyed Unique" means that each of the locks you purchase (if you purchase more than one) will use a different key. If you select "Keyed Alike" instead, each of the locks you purchase (again if purchasing more than one) will use the same key, making it much easier to keep track of if you have multiple trailers. If you are just purchasing one unit then it does not matter which option you choose (although...
    view full answer...
  • Recommended Long Trailer Coupler Pin and Trailer Hitch Lock with Keyed Alike Option
    It sounds like you are looking for a locking hitch pin for the vehicle and locking coupler pin for the trailer. If that is the case, then in order to obtain a keyed alike set the best option would be to go with the etrailer branded locks. If the keyed alike option is selected and the locks are ordered at the same time they will come with the same key. The etrailer Trailer Hitch Receiver Lock part # e98880 is our most popular 2" hitch lock. For a trailer coupler, the longest we have available...
    view full answer...
  • Recommended Locks For 2-1/2 Inch Receiver And Trailer Coupler
    Our Hitch Receiver Lock, part # e98881 is a great lock for your 2-1/2 inch receiver. This features a 5/8 inch diameter pin and has an overall length of 6-7/8 inches. For a coupler lock I recommend our part # e98888. This lock has a 1/4 inch pin diameter and has a span of 3-3/8 inches. Both of these locks have the covered key slot to help prevent corrosion and be keyed alike so you only have one key as long as you order them together. We do not have a hitch pin lock for...
    view full answer...
  • Recommended 1/4 Inch Locking Pin To Replace Detent Pin
    I am not sure what application you are using the detent pin for. Typically they are used on something like an umbrella or can be found on some bike or ski racks. We do not offer locking detent pins but we do have locking pins that may work well for you. One lock I recommend is part # e98888. This is a 1/4 double chrome finish and has a protective cap on the locking porting to keep dirt and moisture out. The pin on this lock is 3-3/8 inches long. For a lock that has a 2 inch span and...
    view full answer...
  • Recommendation for Coupler and Trailer Hitch Locks Keyed Alike
    I have great news! Both the Coupler Lock # e98888 and Hitch Receiver Lock # e98881 that you referenced can be keyed alike. Since these locks are from the same manufacturer, as long as you select "Keyed Alike" on the drop-down menu for both products and purchase all your locks at the same time, they will all come to you keyed alike to each other so you can operate all of them with a single key. I have attached a couple short video demonstrations on these locks that you can...
    view full answer...
  • Trailer Hitch and Coupler Locks That Can Be Keyed Alike
    While we do have options to accomplish what you are wanting to do, we do not have the locks available in black or the bent style if you want everything to be keyed the same. You can use the etrailer Hitch Receiver Lock # e98881 (x3) and the etrailer Surge Brake Coupler Lock # e98888 (x1) to provide you with the 3 hitch locks and 1 coupler lock. These can all be keyed alike by selecting the keyed alike option when adding them to your cart. As far as being able to add locks on later that...
    view full answer...
  • Recommended Trailer Coupler for Lightweight Boat Trailer
    As long as the tongue on your boat trailer does not exceed 3" wide, I recommend using the Demco Channel Tongue Trailer Coupler part # 12564. This coupler fits a 2" hitch ball, has a 10,000 lb weight capacity, and comes with a zinc plating for corrosion resistance. It has an eZ-Latch mechanism which means you do not have to open the latch to couple the trailer. It is also made right here in the U.S.A. If you would like to protect the trailer from theft, I recommend using a lock like part...
    view full answer...
  • Trailer Coupler Latch Lock with 1/4 Inch Diameter and 2-1/2 Inch Span
    Trailer coupler lock # e98887 has a 1/4 inch diameter and 2-1/2 inch span. It is designed to be flush and just wide enough for a 2-1/2 inch span. It is the same as # e98886 but longer. We also have # e98888 with a 1/4 inch diameter and 3-3/8 inch span if you want something that is even longer but it would not be flush with the sides of the latch on the coupler.
    view full answer...
  • Locking Trailer Hitch Pin for 2-1/2 Trailer Hitch Keyed Alike to a Trailer Coupler Lock
    The only option we have for you to receive both a coupler lock and hitch pin lock keyed alike for your 2-1/2" trailer hitch receiver and your trailer coupler would be to use the Trailer Hitch Receiver Lock part # e98881 with the Trailer Coupler Lock part # e98888 or the Coupler Lock part # e98894. Once you have selected the locks, you can then choose to have the locks keyed alike for the drop down menu on the product page. The hitch pin on your 2-1/2" trailer hitch is the same diameter...
    view full answer...
  • Recommended Trailer Coupler Locks That Can Be Keyed Alike
    I have another option for you, but the Bulldog Adjustable Coupler Lock # BD580410 you were looking at can not be ordered keyed alike. Instead I recommend going with the etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome # e98888 which will work with nearly all of the trailer couplers available, and can be keyed alike so you do not have to worry about keeping track of 4 different keys. You will just need to order all 4 at one time, and select the keyed alike option...
    view full answer...
  • Coupler Lock that Fits Bulldog Collar Lok Coupler
    For locking a Bulldog Collar Lok coupler like the # BD028386 we have the part # e98888 which will work well to prevent the collar from sliding back.
    view full answer...
  • Recommended Coupler Lock For Surge Brake Actuator On Continental Boat Trailer
    I may have another option for you, but the EZ Lock Trailer Coupler Lock # BLTL-20 you were looking at is only confirmed to fit the Bulldog Collar-Lok Couplers so it will likely not work on your surge brake actuator. I looked up your Continental Model A2485B-8500 trailer and to lock the surge brake actuator you will need the etrailer Surge Brake Coupler Lock # e98888. I included a video of the # e98888 for you to take a look at.
    view full answer...
  • What Size Coupler Locking Pin is Needed for the Titan Coupler
    You can use a 1/4" coupler lock pin like the etrailer Surge Brake Coupler Lock # e98888 to lock the Titan Coupler # T1755000.
    view full answer...
  • Coupler Lock for a UFP A-60 Boat Trailer Actuating Coupler
    From what I was able to find in the research I did, the recommended lock for a UFP A-60 coupler is a simple pin design, # e98888. This should prevent the handle from operating while the lock is in place (basically used in place of the pin. The difference is that this pin includes a lock). In my research I found that locks like # BLTL-33 are not considered a fit.
    view full answer...

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Info for this part was:

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