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  1. Trailer Tongue Lock
  2. Bulldog
  3. Latch Lock
  4. Keyed Unique
  5. Steel
  6. 3/4 Inch Span
Bulldog Lifelong Trailer Coupler Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome
Bulldog

Bulldog Lifelong Trailer Coupler Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome

Part Number: BD580403
In Stock
$20.28
Retail:$39.25
You Save: 48%
Trailer Tongue Lock
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Guard against trailer theft with this durable steel, butterfly-style coupler lock. Works with most ball couplers that have trigger-style latches. Chrome plating resists corrosion, and the unique ball-bearing locking mechanism provides extra security. Great Prices for the best trailer tongue lock from Bulldog. Bulldog Lifelong Trailer Coupler Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome part number BD580403 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (240)
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Bulldog Trailer Tongue Lock - BD580403

Highlights

  • Unique ball-bearing lock mechanism: Provides maximum security and ease of use.
  • Durable steel construction: Offers superior strength and durability with rust-resistant chrome plating.
  • Trigger-latch compatibility: Works with most trigger-latch-style ball couplers for a secure fit.
  • Compact design: Features a tight 3/4" inside pin length, making it harder to breach.
  • Includes two square keys: High-security design ensures only your keys can access the lock.
  • Plastic key slot cover: Prevents corrosion by shielding the key slot from the elements.

Features to know about

Effortless Security Engagement: Ball-Bearing Locking Mechanism

Ever fumbled with cumbersome locks that are a pain to use? The Bulldog Lifelong Trailer Coupler Lock features a unique ball-bearing locking system that engages smoothly and securely with just a pop. Simply slide the deadbolt portion onto the end of the pin, and you're locked in place. This user-friendly mechanism ensures that you can secure your trailer quickly, without any fuss.

Ultimate Theft Deterrent: Solid Steel Construction

When you're investing in a lock, you want something that will stand up to potential thieves. Crafted from solid steel, this coupler lock is as tough as they come. Its robust construction not only wards off would-be thieves but is also highly durable, giving you peace of mind when leaving your trailer unattended. Plus, the chrome plating adds a layer of corrosion resistance, maintaining its strength and appearance over time.

Versatile Fit for Most Trailers: Trigger Latch Compatibility

No more worrying about compatibility issues with your trailer's latch. This lock is designed to work seamlessly with most ball couplers featuring trigger-style latches, making it a versatile solution for a wide range of trailers. With a 3/4-inch inside pin length and 1/4-inch diameter, it offers a snug fit to keep your trailer secure.

Weather Protection at Its Best: Protective Plastic Cap

If you've ever dealt with a stubborn lock due to rust or dirt, you'll appreciate the plastic cap covering the key slot on this lock. It protects against the elements, preventing corrosion and ensuring that the locking mechanism remains in top condition. Say goodbye to grit and grime gumming up your security system.

Compact and Critical: Easy-to-Handle Size

Don't let its size fool you—this lock is all about big security in a compact package. With its tight fit, it's harder for thieves to tamper with, and its small, unobtrusive form doesn't get in the way of other trailer operations. Despite its size, it packs a serious punch when it comes to safeguarding your valuable assets.

Ease of Use with High Craftsman Finish: Chrome Plating

A lock's appearance and ease of use can say a lot about its quality. The Bulldog Coupler Lock's chrome plating not only resists rust, extending the life of the lock, but also provides a slick, shiny finish that complements your trailer's aesthetics. It operates smoothly, reflecting the high standard of craftsmanship that Bulldog is known for.

Specs

Application

  • Application: trigger-latch-style ball couplers

Dimensions

  • Inside pin length (span): approximately 3/4"
  • Pin diameter: 1/4"

Warranty

  • Limited 1-year warranty

580403 Bulldog Life Long Coupler Lock for Trigger-Style Couplers




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Customer Satisfaction Score:

Ratings & Reviews

4.3

240 reviews
Guard against trailer theft with this durable steel, butterfly-style coupler lock. Works with most ball couplers that have trigger-style latches. Chrome plating resists corrosion, and the unique ball-bearing locking mechanism provides extra security.

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Just as advertised!



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As expected. Well designed. Solid.



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Solid, well made set. Recommended.



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It's all good about the service, very g ood



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Looks to be a fairly strong set up.



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Great



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Fit very well. Service was exceptional, shipping was very fast.



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excellent



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Seem to be well made, time will tell. < br>Thank


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See what our Experts say about this Bulldog Trailer Tongue Lock

  • Recommended Hitch Lock and Coupler Lock Incorporating Safety Chains
    I am not aware of any chain lock. We do have some ball mounts like the B&W Tow & Stow 3-Ball Mount - 2" Hitch - 5" Drop, 5-1/2" Rise - 10K - Black # BWTS10048B which when using a locking hitch pin like # 63232 will secure the shank and ball to the hitch receiver. The Curt Channel Style # C45900 will also secure the ball and mount using # C23556. If you want to secure a coupler to the ball you can use # BD580403. If you really want to secure your chains, you can use a cable lock like...
    view full answer...
  • Anti-Theft Lock Recommendations for Yakima EasyRider Double Decker Trailer # Y08129
    I can definitely help come up with a way to make the Yakima EasyRider Double Decker Trailer # Y08129 as theft resistant as possible but I can't safely recommend you replace the hardware that secures the coupler or hinge to the trailer tongue with hitch locks of any kind. You have to use the included hardware otherwise the warranty of the trailer would be voided and you'd be potentially unsafe to yourself and other motorists. So for the latch of the coupler you could use a trigger latch...
    view full answer...
  • 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.
    view full answer...
  • Stainless Steel Coupler Lock Availability
    There are other manufacturers who make stainless steel coupler locks, but Bulldog is not one of them. I attached a page that has all of the stainless steel coupler locks we offer. None of them are the exact same style as the part # BD580403 that you referenced, but there are some similar ones that could work.
    view full answer...
  • Trigger Latch Lock Recommendation for Demco Coupler with Trigger Latch
    We have a really great solution for a lock for the latch of the Demco Coupler part # DM12925 that you referenced with the Bulldog Lifelong Trailer Coupler Lock # BD580403 that fits tight to the coupler trigger making it very hard to get into. The span on this is 3/4 inch which is the same width as the Demco trigger. I attached a picture of the lock installed as well as a review video for you to check out as well.
    view full answer...
    Image 1 for
  • Recommendation for Most Secure Trailer Coupler Lock
    The more secure coupler locks we offer are designed for be used when the trailer isn't hitched to the vehicle. They're designed to prevent the coupler from being hitched to a trailer ball, like # FA86-0015-305. With the trailer attached to the ball, you'd want to use something that would prevent the latch mechanism of the coupler from being opened, as well as securing the ball mount into the hitch receiver using something like the # BD580402 hitch lock you'd looked at. The latch locks...
    view full answer...
  • 2-1/2 Inch Span Bulldog Lifelong Hitch Lock Recommendation
    For a longer version of the hitch lock that comes with the part # BD580404 you would want the part # BD580402 as it has a 2-1/2 inch span. For the matching trigger latch lock as well you would want the part # BD580403.
    view full answer...
  • 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...
  • 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 # 2878DAT, and # e98889. I have linked some video reviews of these locks for you.
    view full answer...
  • Comparing the Stainless Steel Trailer Coupler Lock e98890 and Trailer Coupler Lock e98889
    The Stainless Steel Trailer Coupler Lock part # e98890 is made of stainless steel, not chrome plated which is why it is more expensive than the Trailer Coupler Lock part # e98889 which is chrome plated steel. The stainless steel option is better as you don't run the risk of the chrome plating chipping and exposing unprotected steel. In regards to the Bulldog Lifelong Trailer Coupler Lock part # BD580403, this will work with pretty much any trigger style latch with a 1/4" diameter pin...
    view full answer...
  • Recommended Trailer Coupler Locks Keyed Alike
    If you are looking for keyed alike coupler locks, I recommend the Fastway Universal Trailer Coupler Lock # FA86-0015-318. This will keep anyone from connecting to your trailer and taking it away. I've attached a video to help with this design and function. If you are looking for a trigger lock, then I recommend the Bulldog # BD580403. There isn't a keyed alike option for these locks.
    view full answer...
  • Lock Recommendation for Fitting Pin on Trigger Latch Coupler
    Sounds like you are looking for a lock for the trigger latch of your coupler. For that we have the Bulldog Lifelong Coupler Lock part # BD580403 designed for this which has a pin diameter of 1/4 inch.
    view full answer...
  • Recommended Trailer Hitch Lock and Trailer Coupler Lock
    For your 2020 Chevy Silverado 3500 with 2-1/2 inch trailer hitch receiver I recommend the etrailer Hitch Receiver Lock for 2" and 2-1/2" Hitches - Flush - 3-5/8" Span - Chrome # e98881 and then the Bulldog Lifelong Trailer Coupler Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome # BD580403. These are great locks that will help deter theft. Unfortunately we do not currently have any keyed alike options compatible with 2-1/2 inch trailer hitch receivers. I recommend keeping the...
    view full answer...
  • Replacement Keys For Bulldog Coupler Lock # BD580404
    Though we do not sell the replacement keys individually the only way we can help you is if you purchase The whole Bulldog Lifelong Trigger-Style Coupler Lock and 2 inch Trailer Hitch Receiver Lock - Chrome # BD580404 again I attached a review video link below.
    view full answer...
  • Coupler Lock for Titan # T43329007K Brake Actuating Trailer Coupler
    The Bulldog coupler lock you referred to, part # BD580403 would not fit the Titan Brake Actuating Coupler you mentioned. The lock simply is not compatible with that style of coupler. A better choice would be a Universal Coupler Lock like the Fastway # FA86-0015-318. I have linked you to a product demonstration video showing how the lock works. To view the video, simply click the link.
    view full answer...
  • Recommended Pin Lock for Trailer Coupler
    The Bulldog Lifelong Trailer Coupler Lock part # BD580403 is an excellent option to secure a trailer. It will prevent the trailer from being coupled as well as preventing the trailer from being uncoupled. The ball-bearing design really makes for a smooth action and operation. Atwood is no longer in business.
    view full answer...
  • Recommended Trailer Coupler Locks for Open Car Hauler
    We have numerous hitch and coupler locks available. I'm assuming you're looking for a coupler lock that would prevent somebody from hitching your trailer up and taking off with it, is that correct? If your trailer uses a simple latch style coupler like part # BD580403. The locking pin would insert through the hole in the coupler latch, and would prevent the coupler from being opened. If the coupler has a flange around it's lower edge, something like our # e98893 would work well on 1-7/8...
    view full answer...
  • Trailer Coupler Latch Lock with a 1/4 Inch Diameter Pin Longer than 3/4 Inches
    We have several latch locks that have longer pins you could use. Master Lock Adjustable Trailer Coupler Lock - Stainless Steel Item # 2847DAT has an adjustable span of 9/16" to 2-3/4". Stainless Steel Trailer Coupler Lock # e98890 has a span of 7/8" as does lock # 2878DAT. I have linked videos of these locks for you.
    view full answer...
  • Distance Between Lock Pin and Housing on Bulldog Lifelong Trailer Coupler Lock
    The distance between the lock pin and housing on the Bulldog Lifelong Trailer Coupler Lock # BD580403 is 1-5/8".
    view full answer...
  • Recommended Gooseneck Coupler Lock for Puma Trailer
    We have a few different options depending on the gooseneck coupler you have on your Puma trailer. If you have a Bulldog, Stallion, Superior, or T.E.M. coupler then I recommend the Blaylock EZ Lock Gooseneck Coupler Lock # BLTL-50-40D. If you have a RAM coupler then you would need the # BLTL-55-40D instead. Both of these have an option to come with the Blaylock EZ Lock for Set Screw on Gooseneck Coupler - Aluminum # BLTL-51-40D. You would need the # BLTL-53-40D2 or # BLTL-57-40D2. The...
    view full answer...
  • Can Pintle of B&W Tow and Stow # BWTS10056 Be Moved Down to Lock Coupler Onto Trailer Ball
    Due to the thickness of the top of the coupler, you wouldn't be able to lower the pintle all the way when used on a regular coupler. You'd be better off using a coupler lock to prevent the coupler from being unhooked. The best lock for you will depend on the design of your coupler. If you have a latch style, a lock like the Bulldog # BD580403 would be an excellent choice, and could be used while towing. To view a product demonstration video of the ball I recommended, click the provided link.
    view full answer...
  • Are There Coupler Locks that Can be Ordered Keyed Alike
    Hey David, I attached a link on this page that has all of the different coupler locks we carry that can be keyed alike for you to check out.
    view full answer...

Do you have a question about this Trailer Tongue Lock?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
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Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Lindsey S
Written by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
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Wilson B
Employee Alexander C
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Alexander C
Employee Dustin K
Video by:
Dustin K
Employee Bradley B
Installed by:
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