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  1. Trailer Tongue Lock
  2. etrailer
  3. Latch Lock
  4. 7/8 Inch Span
  5. Stainless Steel
  6. Keyed Alike
etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel

etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel

Our Price: $33.26
Trailer Tongue Lock
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This rustproof, stainless steel coupler lock is designed to fit latch-style trailer couplers. Covered keyhole helps to prevent internal corrosion. Can be keyed alike to match other etrailer locks. Great Prices for the best trailer tongue lock from etrailer. etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel part number e98890 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (62)
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etrailer Trailer Tongue Lock

  • Latch Lock
  • etrailer
  • 7/8 Inch Span
  • Stainless Steel
  • Keyed Alike
  • Universal Application Lock

This rustproof, stainless steel coupler lock is designed to fit latch-style trailer couplers. Covered keyhole helps to prevent internal corrosion. Can be keyed alike to match other etrailer locks.


  • 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 with the coupler locked either
  • Tamper-resistant design
    • Conical shaped housing ensures tight fit against coupler latch
    • Pick-proof screw-and-lock mechanism provides security
  • Solid stainless steel pin and lock housing are extra-durable and rustproof
  • Rubber end makes pin easy to grip
  • Plastic cap covers key slot to help prevent internal 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: trigger-latch-style (or lever-latch-style) ball couplers
  • Inside pin length (span): 7/8"
  • Overall length: 4-1/2"
  • 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.

e98890 etrailer Stainless Steel Trailer Coupler Lock - 7/8" Span

Alternate part number: RC6-SS

Item # e98890

California residents: click here

Customer Satisfaction Score:

Customer Reviews

etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel - e98890

Average Customer Rating:  4.6 out of 5 stars   (62 Customer Reviews)

This rustproof, stainless steel coupler lock is designed to fit latch-style trailer couplers. Covered keyhole helps to prevent internal corrosion. Can be keyed alike to match other etrailer locks.


Love these locks! I bought several! I’m using one for its intended a trailer coupler lock on my Malone Microsport Trailer. The other two are being put to use on the Malone hard-sided trunk that rests on the trailer. The trunk has left and right closures with very small aligned openings to put a lock through. ..The small diameter of these bolt locks fits perfectly! I gave these locks an excellent rating..yet there is one thing that could be improved upon..the instructions! My advice..completely ignore the instructions on how to open/lock the device. Instead..just use the key in the lock like you would a screwdriver..just keep turning the key clockwise to seat/lock the bolt into the device…just keep turning the key counterclockwise to remove/unlock the bolt from the device. Very easy to lock and unlock…if you don’t read the instructions!


I had already purchased a receiver lock a couple months earlier and then placed a new order for a coupler lock and spare keys to match all locking devices and existing keys. tracked down a coupler lock and all keys to match my existing receiver lock key# so I have a single key for all lock devices. I was very happy with their follow-up and service. Thanks.


Arrived quick. Mixup in ordering (added key alike, but could not do it with an older lock I had bought of same type). Chat agent adjusted the invoice balance on the spot.


Great screw together safey/security feature. (Not just a push thru pin) Stainless steel no rust. Works like new


Lock functions well though after a year it is corroding which is a disappointment as this is why I purchased a stainless steel lock


This has been a great lock for my hitch. No rust, and a solid little lock. The 1/2" version fit perfect on my Bulldog hitch. The 7/8" lock was a bit too long, so be sure to measure. I also got the larger receiver lock, also in stainless, and also a fantastic lock. You can get both locks keyed the same so there's one less key to worry about. Highly recommended!



Still working great! No signs of wear. Very happy with these locks.


Another cleverly designed, high-quality product from DeadBolt. I was able to get this item keyed alike with other products from this company such as the hitch receiver lock and the trailer coupler lock. Thumbs way up.



I stand by my review and I love these DeadBolt products.


Nice added security to my trailer hitch. The quality is nice.


So easy to install. Insert key in one end and twist other end to separate parts for install or remove. SS should eliminate rust concern.


I purchased this for my Keystone Laredo Travel Trailer. I could not use this in my application because the side barrels were too big to close the latch. (the locking hole was too close to the hitch structure) I feel that this is a quality lock and liked the Stainless construction. I believe that it would have worked great and saved it for future trailers. I purchased a locking assembly from another company for my travel trailer. Small Company, best lock out there for this application. E-Trailer should sell these.


Product is good--However a couple of problems--in very cold / snowy weather, as experienced in northern Ontario, Canada, lock can freeze up. Needed to heat the key and lock with a lighter, then try to insert the heated key to thaw the workings. Then sprayed in lock thaw product. Yes, the rubber / plastic protective end cap was in place prior to trying to unlock.


Potential buyers should be aware that the barrels on the ends have a large enough diameter that might prevent its use on your trailer--as it did mine. The lock does appear to have a good build quality though; and, if it fit I would use it.

Etrailer Expert

Heather A.


Thank you for your review. The span of the pin is 78 of an inch. If the width of the latch is wider than that, you will need a longer latch lock. I have added a link for the latch locks we offer.


This is a good unit, I have one like it for the receiver. However, this one doesn't fit my trailer. The large diameter ends are too big to fit. My coupler doesn't have enough height between the center of the hole and the top of the coupler head. It would be helpful to include this measurement on the description and/or video. I feel that my coupler is a common size/style but cannot use this device.


Great quality hitch lock for my travel trailer hitch latch. Fast shipping too as usual. Great job


Doesn't fit my camper or sure-trac trailer coupler due to the end being so big. The width is good but can't install when coupler is latched.


Did not fit my coupler because the diameter of the two main barrels are too big and would not allow the lock to line up through the couplers hole. Otherwise a quality lock, I would have liked to keep it.


I bought this to compliment a trailer and receiver lock that I had purchased earlier and had it keyed to match. Worked great and etrailers customer service was excellent, as always.


I ordered several at the same time so that I could get them keyed the same. They were. They fit my trailers as planned. Now I will see if they can withstand the "test of time". Being stainless I hope they do.


Feels like a high quality lock. Love that's it's stainless steel. It's a little cumbersome to use the key like a screwdriver and unscrew the lock head though. Bonus that they can be keyed alike with the same brand.


Nice quality coupler lock. Nicer than other name brand locks. Hopefully it will resist corrosion as advertised.


Easy ordering, fast shipment and product received matched product description.

Second order with - always very satisfied with purchases.


Product construction is very good. At the time of purchase, I did not realize the different type of locking mechanism. The unit locks using a 1/4-20 stud threading into the shaft portion of the lock. A bit weird at first use, but got used to it. I did contact eTrailer and asked some questions. The rep was very nice and down to earth.


This was a lot lighter than I expected but a lot more sturdy build than the yellow, red and black plastic ones i've used (I'm leaving out brand names but these colors should help). Like all of them I'm concerned about how brittle the material gets in the cold of winter in Alaska but like anything, if somebody wants it they will get it.


Like the design, but had lost the keys and had to break them. Literally one hit with a hammer and the broke off. They keep honest people honest, but are a low grade level of protection.


The Deadbolt Stainless Option is the way to go. The fit and finish was excellent. eTrailer has been great the whole way. Thanks etrailer for the products and service.

Show More Reviews

See what our Experts say about this etrailer Trailer Tongue Lock

  • 1/4" Diameter Locking Pins Which Can Be Keyed Alike
    Here is a list of different length 1/4" pin locks we offer which can be keyed alike. 1/2" Long Pin Lock # e98885 7/8" Long Pin Lock # e98890 2" Long Pin Lock # e98886 2-1/2" Long Pin Lock # e98887 3-3/8" Long Pin Lock # e98888 We also have the Adjustable 1/4" Lock # e98883 which can fit from 1/2" to 2-1/2" spans you can get keyed alike as well.
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  • Keyed Alike etrailer Couple Lock Options
    When you purchase the etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel item # e98890 you will select the number of locks you want that are going to be keyed alike. You can do this with different size etrailer locks too. Like the etrailer Trailer Hitch Receiver Lock for 2" Hitch - Flush - 2-5/8" Span - Stainless Steel item # e98882. You will just need to make sure you check them all out at the same time. If you already own multiple locks there is no way...
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  • Is the Master Lock 2878DAT Able to be Keyed Alike
    Though I do have another option for you, the Master Lock 7/8" Wide Trailer Coupler Latch Lock # 2878DAT is not able to be keyed alike, unfortunately. With that being said, the Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel # e98890 will be a different design, but can be keyed alike. This is also made in the USA.
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  • How to Get etrailer Coupler & Hitch Locks Keyed Alike
    You can get those locks all keyed alike, but there isn't a set with all three together. Instead, what you'd do is go to the product pages of each, and on those product pages there is a drop-down box that says "Keyed Alike?" and you'd select the keyed alike option for each lock: - etrailer Trailer Hitch Receiver Lock for 2" Hitches # e98880 - etrailer Surge Brake Coupler Lock - 2-1/2" Span - 1/4" Diameter # e98887 - etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter # e98890 When...
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  • Can an 2 Inch Hitch Lock and Two 7/8 Inch Coupler Locks be Keyed Alike
    Yes, as long as the locks are from the same manufacturer and listed as being able to be keyed alike on the items product page, we can accommodate your request. On the product page, in the middle of the page, right under the shipping special box is a drop down box that will allow you to choose to have your locks keyed alike. There is another box right under it for the quantity you need. If you want our 2 Inch Hitch Receiver Lock, part # e98882, keyed alike you will go to the...
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  • Availability of Coupler Locks That Are Keyed Alike
    The Master Lock Coupler Lock # 2847DAT is not offered keyed alike but other similar coupler locks can be ordered in multiples that can use the same key. The linked page displays all coupler latch locks that are available keyed alike. These are offered in various lengths, such as the 1/2-inch span # e98885 and the 7/8-inch span # e98890. Once you choose your preferred lock simply select Keyed Alike from the drop-down menu tool on that page and indicate your desired quantity.
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  • Recommended Keyed Alike Lock for Latch Style Trailer Coupler
    We sure can, but the Master Lock # 605DAT lock you'd looked at isn't available keyed alike. We do have options for keyed alike coupler locks, however. I'd recommend a latch lock such as the etrailer brand # e98890 for a 7/8 inch span or # e98885 for a 1/2 inch span. The locks are constructed of stainless steel for superior corrosion resistance and are available keyed alike. Just choose 'keyed alike' on the drop down menu on the product page and choose your desired quantity. You'll want...
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  • 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 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.
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  • Locking Options for Malone MicroSport MPG462G2 Trailer for 4 Kayaks
    The trailer doesn't include locks, which is typical, as trailers don't usually include them. The good news is that there are tons of locking options available, and usually using more than one locking option at a time will deter all but the most determined thief. The Malone MicroSport # MPG462G2 trailer uses a typical 2 inch channel tongue coupler. At a minimum, I'd use a coupler latch lock like part # e98890. I even use these while towing, to prevent the latch from coming open or some...
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  • Comparison of the Deadbolt Coupler Lock and Master Lock Adjustable Coupler Lock
    The main difference between our Coupler Lock, item # e98890, and the Master Lock Adjustable Trailer Coupler Lock - Stainless Steel, item # 2847DAT, is the style of the locks. The Masterlock has the advantage of being able to be used on many different styles of coupler and has a normal style key that can be duplicated at a local hardware store. The Deadbolt has a short span, 7/8 inches, so it can be flush to prevent removal. This style is more compact than the stick and block...
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  • Recommended Coupler Lock for Demco Channel Tongue Trailer Coupler
    To secure your Demco coupler, part # DM12925, which you referenced, I recommend our Stainless Steel Trailer Coupler Lock, part # e98890. This part uses a barrel type lock that's ultra secure.
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  • Can the Master Lock Trigger Style Coupler Lock for 1-7/8" and 2" Couplers Be Keyed Alike
    I have a solution for you, but the Master Lock # 605DAT is not available as a keyed alike lock. However, you can get the etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel # e98890 keyed alike and it will offer the same function to lock your coupler latch. This lock is made from durable stainless steel and comes with a dust cap for the lock face to keep it free from moisture and debris. I've linked a review video of this lock for you to check out, but these...
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  • Do Locking Hitch Pins have a Towing Capacity and Multiple Hitch and Coupler Locks Keyed Alike
    Trailer hitch lock # e98882 does not have an official weight capacity because it exceeds what the trailer hitches are capable of (for Class III and IV hitches). So it can handle a 10,000 pound trailer or more. The diameter of the thicker ends of this lock are approximately 1 inch. Lock # e98890 is a coupler latch lock. The diameter of the pin is 1/4 inch. The length of the pin is 7/8 inches. The ends are 1 inch in diameter as well. Since this is for the trailer coupler it would not interfere...
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  • Coupler Pin Locks that Can be Keyed Alike
    We have coupler pin lock locks that can be keyed alike like the part # e98888 which has a span of 3-3/8 inches and # e98887 which has a 2-1/2 inch span. Or even # e98890 with a 7/8 inch span or # e98886 which has a 2 inch span. On the product page you'll select keyed alike on the drop down menu and all of the locks will use same key.
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  • Recommended Trailer Coupler Locks That Can Be Keyed Alike
    I have another option for you, but there is not a way to get 5 of the Bulldog Lifelong Trailer Coupler Lock # BD580403 keyed alike. Instead I recommend the etrailer Trailer Coupler Latch Lock in Stainless Steel # e98890 or Chrome # e98889 which can be keyed alike. All you will need to do is select the keyed alike option from the drop down menu, and change the quantity to 5 before adding them to your cart. I included a video of the etrailer # e98890 and # e98889 for you to take a look at.
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  • Can Deadbolt Hitch Lock # 40107 be Keyed Alike to Coupler Lock
    Yes, if you select "keyed alike" on the product page for the hitch lock part # e98882 and on the page for the coupler lock part # e98895 you'll get both the coupler and hitch locks keyed alike. If you had a different coupler lock in mind you'd be able to do the same thing to have it keyed the same as the # e98882.
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  • Solution for Keyed Alike Receiver and Coupler Latch Locks
    The Flint Hill Goods # FHG22VR and # FHG44ZR do not come with a keyed alike option. Instead, I recommend the etrailer Trailer Hitch Receiver Lock # e98880 and Trailer Coupler Latch Lock # e98890. Choosing the Keyed Alike option in the drop down menu before you add to cart will get you a full set of matching keys and locks.
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  • Do you Have the etrailer Trailer Coupler Latch Lock with a 1 Span
    The closest I have to the 1" is the etrailer Trailer Coupler Latch Lock part # e98890 which has the 7/8" span. There is some excess threading in the lock when installing it that will allow it to work with your 1" span requirements. Unfortunately they can only be keyed alike when ordered together.
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  • Trailer Coupler Latch Lock with 1 Inch Pin Span
    Master Lock has an adjustable latch lock, # 2847DAT that has presets for either a 1 inch span or a 2 inch span. We also have some that are 7/8 inch spans which is 1/8 of an inch more than a 3/4. We have # e98890, # 2878DAT, and # e98889. I have linked some video reviews of these locks for you.
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  • Recommended Trailer Coupler Latch Lock Keyed Alike
    I reached out to my contact at Master Lock, and the 7/8" Wide Trailer Coupler Latch Lock # 2878DAT are keyed at random and do not have the ability to be keyed alike. For a similar option you can use our # e98890 which can be keyed alike. Alternatively, you may be interested in the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # FA86-0015-318 which can also be keyed alike and add even more security. I've attached a video review to assist.
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  • Recommended Coupler Locks for Bulldog Cast Head Coupler # BDA256C0317
    I pulled one of the Bulldog # BDA256C0317 couplers off the shelf, and tested it with various coupler locks. Other than our locks like the # e98890 that pass through the latch, I found three locks that would work pretty well for you. The fit of the Blaylock EZ Lock # BLTL-33 was a bit loose, but once the locking bar was slid into place, I was unable to remove the lock by hand, although a pry bar might get it off. The Master Lock Universal Trailer Coupler Lock, # 379DAT installed...
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  • Replacement Keys for Bulldog Lifelong Trailer Coupler Latch Lock
    Unfortunately, the Bulldog Life Locks like part # BD580403 are uniquely keyed and replacement keys aren't available. Your best bet would be to cut the lock off and replace it. The etrailer brand locks are available keyed alike if you wish, so you could get a locking hitch pin like # e98882 and a latch lock like # e98890 that are keyed alike. If you write down the key number, and put it in a safe place (but not so safe that you can't find it later), we can get replacement keys for you if...
    view full answer...
  • How To Order Stainless Steel Hitch Locks and Coupler Locks to be Keyed Alike
    For stainless steel coupler lock and hitch receiver lock that can be keyed alike, I would recommend the etrailer brand locks. They offer the etrailer Stainless Steel 2 Inch Hitch Receiver Lock, part # e98882, which will fit most 2 inch hitch receivers, and has an inside width of 2-5/8 inches. For coupler locks they offer the etrailer Stainless Steel 7/8 Inch Span Coupler Lock, part # e98890, which has an inside width of 7/8-inch, and the etrailer Stainless Steel 1/2 Inch Span Coupler...
    view full answer...
  • Recommended Trailer Coupler Lock That Has Replacement Keys Available
    I have a replacement option for you, but after reaching out to my contact at Curt I was informed that there are no replacement keys available for your Curt Coupler lock 23521. If you no longer have the keys you will need to go ahead and replace the lock. I recommend the etrailer Trailer Coupler Latch Lock - 7/8" Span - 1/4" Diameter - Stainless Steel # e98890. I included a video of the # e98890 for you to take a look at.
    view full answer...

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