Atwood AMPlock Underslung Coupler Lock - 2-5/16" Ball Couplers - Cast Iron

Atwood AMPlock Underslung Coupler Lock - 2-5/16" Ball Couplers - Cast Iron

Item # AT89006

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Trailer Coupler Locks

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Atwood Cast Iron Trailer Coupler Locks - AT89006
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Product Images

Customer Photos

Designed for a coupler that welds to the bottom of your trailer's A-frame, this cast iron lock blocks the coupler's ball socket and surrounds its lip to deter theft. Rotating-disc-tumbler lock is bump-proof. Lowest Prices for the best trailer coupler locks from Atwood. Atwood AMPlock Underslung Coupler Lock - 2-5/16" Ball Couplers - Cast Iron part number AT89006 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (8)
  • Q & A (11)
  • Photos
  • Why etrailer?

Atwood Trailer Coupler Locks - AT89006

  • Fits 2-5/16 Inch Ball
  • Surround Lock
  • Atwood
  • Keyed Unique
  • Underslung Coupler Lock
  • Cast Iron

Designed for a coupler that welds to the bottom of your trailer's A-frame, this cast iron lock blocks the coupler's ball socket and surrounds its lip to deter theft. Rotating-disc-tumbler lock is bump-proof.


Features:

  • Heavy-duty coupler lock deters trailer theft by preventing hookup
    • Locking pin engages coupler's ball socket like trailer ball does
    • Lock body fits over the lip of your coupler to block access to hitch ball socket
  • Rotating-disc-tumbler lock provides maximum security
    • Nearly a million possible key codes
    • Bump-proof and resistant to picking
    • Hardened washers prevent drilling into lock core
  • Cast iron body resists freezing, shattering, drilling, and burning
  • Locking pin is made of sturdy steel
  • Black powder coat finish resists corrosion
  • 2 Notched keys included


Specs:

  • Application: underslung trailer couplers for 2-5/16" balls
    • Maximum coupler width (including lip): 4-5/8"
    • Maximum lip thickness: 2-1/2"
  • Locking pin diameter: 7/8"
  • 2-Year warranty


Note: This lock is designed to fit couplers that mount on the bottom of your trailer frame. If your coupler is not underslung, this lock will not be able to clamp around its ball socket.


Atwood 89006 Lock Diagram

The AMPlock from Atwood obstructs access to your trailer coupler to prevent would-be thieves from hitching your trailer to another tow vehicle and driving off with your gear.


Secure Locking Mechanism

This coupler lock has a disc tumbler locking mechanism. Unlike locks that use vulnerable spring-loaded pins, this ultra-secure Abloy-style lock is bump-proof. The cylinder has a series of rotating discs that can be correctly lined up only when you turn the corresponding key. Two identical notched keys are included to operate the lock. Because these keys feature 1 of nearly a million possible key codes, it's extremely unlikely that another individual will have a key that can open this lock.


Durable Construction

This heavy-duty coupler lock has a cast iron lock body, a steel locking pin, and a rust-resistant powder coat finish. The lock body is shatterproof. And hardened washers around the tumbler make it especially difficult to drill through the lock core.


Quick, Simple Operation

To install this lock on your coupler, insert the key and rotate it to release the locking pin.

Atwood Receiver Lock Operation

Slide the lock body onto the flat lip of your trailer coupler. Push the locking pin into the hitch ball socket to engage, rotate the key back to lock the pin in place, and remove the key.



678235 Atwood Amp Lock Trailer Coupler Lock with 2 Keys for 2-5/16" Ball Bottom-Mounted Couplers

Replaces 89006








Customer Reviews

Atwood AMPlock Underslung Coupler Lock - 2-5/16" Ball Couplers - Cast Iron - AT89006

Average Customer Rating:  5.0 out of 5 stars   (8 Customer Reviews)

Designed for a coupler that welds to the bottom of your trailer's A-frame, this cast iron lock blocks the coupler's ball socket and surrounds its lip to deter theft. Rotating-disc-tumbler lock is bump-proof.

- AT89006
by:

The lock came quicker than I figured on. It was in good shape and it fit the lowslung hitch like a glove. Take a look at the picture. Now I don't have to think about the security of my RV. 700665



- AT89006
by:

This lock is heavy duty. It would be tough to break this lock. Good security protection for my trailer 639849



- AT89006
by:

To protect your investment this TT coupler lock is heavy duty. Not many options for newer Jayco underslung coupler. Fit a little loose but very happy with purchase. Noah in consumer service was very helpful. Good luck trying to get this lock off. It came painted black but I wanted it to be more visible. See photo. Thanks etrailer 697805



- AT89006
by:

Special ordered for a customer, he is very pleased i was able to find these for him. Always a pleasure doing business with etrailer.com. great product, great prices and fast easy delivery! 561757



- AT89006
by:

Great advice and very quick delivery for pending rv trip. 395248



- AT89006
by:

Expensive but worth the piece of mind! What’s the saying - “locks only honest people honest”! Let’s face it, if someone wants your stuff they will take it. However, a quality lock like this one makes it very difficult to steal a trailer. This is my second lock of this type. 470932



- AT89006
by:

This is a great lock. Heavy duty. 461997



- AT89006
by:

Finally found a hitch lock that fits our new Jayco. This one slides right on and it appears that the lock would be difficult to pick. It's also a very sturdy lock. Definitely would recommend this one. 698305


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Ask the Experts about this Atwood Trailer Coupler Locks

Do you have a question about this Trailer Coupler Lock?


  • Recommended Lock for Underslung Coupler on 2018 Jayco Trailer
  • Your new 2018 Jayco trailer has a bottom mount or underslung coupler. For a lock that will work well, I recommend the Atwood AMPlock Underslung Coupler Lock # AT89006. This cast iron lock is designed specifically for underslung couplers and will help deter theft by blocking the ball socket and the surrounding flat lip. It features a rotating-disc-tumbler lock that provides maximum security with nearly a million possible key codes. It will fit flat-lipped couplers for 2-5/16 inch balls with...
    view full answer...

  • Will Atwood AMPLock Underslung Coupler Lock Fit Underslung Coupler on 2020 Jayco White Hawk
  • Since you have an underslung 2-5/16" coupler on your 2020 Jayco White Hawk trailer the Atwood AMPlock Underslung Coupler Lock # AT89006 should fit just fine. You just need to make sure that your coupler doesn't exceed 4-5/8" wide and that the lip thickness doesn't exceed 2-1/2" (see attached photo).
    view full answer...

  • Is the Atwood AMPlock Underslung Coupler Lock the Same as the AMPLOCK U-TLS2516I
  • Although we don't carry the AMPLOCK U-TLS2516I, from what I could find it does look exactly the same as the Atwood AMPlock Underslung Coupler Lock # AT89006. The AMPlock Underslung Coupler Lock is compatible with 2-5/16" couplers that are no wider than 4-5/8" (including the lip), and have a lip no thicker than 2-1/2" (see attached photo). You can use this to determine if it is the correct fit for your application. It also has a cast iron body and comes with a 2-year warranty. I have...
    view full answer...

  • Coupler Lock Recommendation for Trailer with Underslung Coupler
  • Thanks for the picture of your coupler! From that I can tell you have an "underslung" coupler which we have a coupler lock specifally designed for. For that you'd want the AMPLock Coupler part # AT89006 which will work great for you. I attached a picture of it installed on an underslung coupler just like yours as well.
    view full answer...

  • 2015 Jayco Jay Flight 27RLS Coupler Lock Recommendation
  • I pulled up a picture of your 2015 Jayco Jay Flight 27rls and the coupler looks to be an underslung coupler like the part # CA-5335-B. Which then for a lock that is specifically designed to fit this type of coupler we have the part # AT89006 from Atwood that will work great. I attached a picture of this lock installed on a coupler for you to check out as well.
    view full answer...

  • Recommended Lock for Underslung Coupler on 2018 Jayco Jay Feather 27RL Travel Trailer
  • The most versatile coupler lock that is guaranteed to work with your 2018 Jayco Jay Feather 27RL is the Fastway Universal Trailer Coupler Lock for 1-7/8", 2" and 2-5/16" Couplers # DT25013KA. This has the tube key lock cylinder for more security. Another great option is the Atwood AMPlock Underslung Coupler Lock - 2-5/16" Ball Couplers - Cast Iron # AT89006 but I can't confirm the height of your coupler will be compatible.
    view full answer...

  • Recommended Trailer Coupler Lock for Multiple Wells Cargo Trailers
  • The Atwood AMPlock Underslung Coupler Lock part # AT89006 as the name states is for underslung trailer couplers, which is not what you have. You have an overslung trailer coupler therefore the AMPlock won't work. It also only fits trailers with a 2-5/16"coupler. For your multiple 2003 Wells Cargo Trailers, I recommend the Fastway Universal Trailer Coupler Lock part # DT25013KA because it is designed for overslung trailer couplers, will fit both 2" and 2-5/16" couplers, and best of all...
    view full answer...

  • Will Atwood AMPlock Underslung Coupler Lock # AT89006 Fit a Grand Design Imagine Travel Trailer
  • Atwood AMPlock Underslung Coupler Lock # AT89006 will fit couplers under 4-5/8 inches wide and under 2-1/2 inches tall. If the coupler on your trailer meets those requirements then the lock will fit.
    view full answer...

  • Trailer Lock Recommendation for Coupler that is 5 inches Wide
  • For a coupler lip width of 5 inches your best option would be to look into a wheel lock since none of the coupler locks we offer will fit around that wide of a coupler. For a wheel lock we have the Stallion Wheel Lock part # 288-02020 which would be a great option. Then for a lug nut lock set we have the part # RG01-150.
    view full answer...

  • Replacement for Atwood AMPlock Trailer Coupler Lock Part AT89004
  • The Atwood AMPlock Trailer Coupler Lock part AT89004 which is for overslung couplers (coupler on top of frame) has been discontinued by the manufacturer as with a lot of Atwood products as they are no longer in business. The Atwood AMPlock Underslung Coupler Lock part # AT89006 which is for underslung couplers (coupler on bottom of frame) is only available while supplies lasts and has also been discontinued by the manufacturer. That said, you do not need to use an Atwood coupler lock...
    view full answer...

  • Coupler Lock Recommendation for Demco Adjustable Coupler part # DM6125
  • The Demco Adjustable Coupler part # DM6125 that you mentioned does not have a lip around the base of it so a coupler lock like the Atwood part # AT89006 that you mentioned is not going to work. For this type of coupler you'd need a lock like the Fastway Trailer Coupler Lock part # DT25013KA. I attached a picture that shows this lock installed on a similar coupler that does not have a lip around the base of it as well.
    view full answer...


Do you have a question about this Trailer Coupler Lock?




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Info for this part was:

Expert Research:
Michael L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Edited by:
Lindsey S
Installed by:
Kathleen M
Written by:
Lisa S
Updated by:
Sarah W
Updated by:
Hannah L

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