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

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

Item # BD580403
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Trailer Coupler Locks
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BD580403 - 3/4 Inch Span Bulldog Trailer Coupler Locks
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In Use/Installed

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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. Lowest Prices for the best trailer coupler locks 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 800-298-8924 for expert service.
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  • Reviews (269)
  • Q & A (14)
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  • Why etrailer?

Bulldog Trailer Coupler Locks - BD580403

  • Bulldog
  • Latch Lock
  • Keyed Unique
  • 3/4 Inch Span
  • Universal Application Lock
  • Steel

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.


Features:

  • 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
  • Ball-bearing locking system provides maximum security and ease of use
    • Just pop the deadbolt portion onto the end of the pin and the lock will automatically engage
    • Grease ball-bearings periodically to ensure smooth operation
  • Solid steel construction offers superior strength and durability
  • Chrome plating resists rust
  • Plastic cap covers key slot to help prevent corrosion in the locking mechanism
  • 2 High-security, square keys included


Specs:

  • Application: trigger-latch-style ball couplers
  • Inside pin length (span): approximately 3/4"
  • Pin diameter: 1/4"
  • Limited 1-year warranty


The unique ball-bearing locking system on this Lifelong coupler lock is supremely easy to use. When you pop the deadbolt portion of the lock onto the end of the pin, the integrated ball bearings engage the lock automatically.



580403 Bulldog Life Long Coupler Lock for Trigger-Style Couplers




California residents: click here



Customer Reviews

Bulldog Lifelong Trailer Coupler Lock - Trigger Latch Style - 1/4" Pin Diameter - Chrome - BD580403

Average Customer Rating:  4.7 out of 5 stars   (269 Customer 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.

- BD580403
by:

Nice lock 508695



- BD580403
by:

Had no problems with the lock as long as I lubricate it twice a year (salut and winter weather). Would have like it in stainless for longivity! 364155



- BD580403
by:

quick shipping and good packaging. Lock comes with weatherproof cover for the keyhole which is nice 899531



- BD580403
by:

897960



- BD580403
by:

Could not use this type for my applicat ion. 897683



- BD580403
by:

Fits on my trailer and works to lock in place. 861862



- BD580403
by:

These coupler locks fits great because they are so close and tight the coupler it would be very difficult and very time consuming to cut. Good heavy material and great locking system. 859693



- BD580403
by:

Online pictures don’t do this lock justice. I was surprised at how heavy duty this lock is and I am glad I made the purchase. You will not be disappointed. 856978



- BD580403
by:

Simple design, dont be fooled, it does the job well, secured trailer in the parking lot with decent lighting. Been on several outfits state travels and I am thankful that the reviews were positive, making my choice to purchase this easier. No issues of it being in open weather with its cover,opens every time. No rust to be found. In all, it provides a level of security for my trailer or at least make it real hard to steal. 828774



- BD580403
by:

This lock works and performs just like the receiver lock. The ball bearings will need a slight coating of grease to keep things moving over the long haul. I only wish this was made in Stainless Steel to match the other lock. Having just received this, I will update in the future if any problems appear. Extremely happy with speed of delivery and availability of these locks. 806323



- BD580403
by:

A robust design well executed. A product that instills confidence in the security provided by its use 799369



- BD580403
by:

This lock has served it's purpose well. No rust or other external blemishes. It can be difficult to lock sometimes (which is usually just user error). 776220



- BD580403
by:

It fit. A reviewer of another product recommended this product, after trying another brand that did close enough to lock. I've been a customer of etrailer for a couple of years. This sale was perfect, and was delivered several days prior to estimate. Etrailer.com .......... always a great choice. 773740



- BD580403
by:

Product was just as described and great quality and was received within a few days 737418



- BD580403
by:

I had a trailer stolen. This is going on the new one. Much better than my old lock. 729764



- BD580403
by:

Not quit wide enough for my latch but should work with most 708403



- BD580403
by:

These locks performed horribly, the three I purchased had all become impossible to unlock and remove from the trailer coupler. I had to cut them off with a grinder/cut-off wheel. That being said, I was delayed hooking up my trailer 45 minutes by the time I got the lock removed. The stainless steel ones I had prior held up great. These were a waste of money. 700469



- BD580403
by:

good 692737



- BD580403
by:

Order was delivered four days ahead of schedule and was just what they advertised. Sales person was knowledgable of thre weight distribution system and helped me order the correct down shank my truck and trailer required. As usual a good experience. 690627



- BD580403
by:

The lock is currently being used to secure a metal gate with very tight clearance where most locks do not clear. The attached photo shows the lock installed. 679800



- BD580403
by:

Excellent item. Better deterrent than a standard lock. 633373



- BD580403
by:

There's nothing wrong with this lock as I bought it as an option to another lock for my trailer coupler. I can't use this one due to the short "span" of the pin but I will be able to use it somewhere. 616582



- BD580403
by:

great product very good price and fast delivery was very happy with it 616111



- BD580403
by:

Well made and works as it should. 570445



- BD580403
by:

Very good looking product and good quality. A must have. 569995


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Ask the Experts about this Bulldog Trailer Coupler Locks

  • 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.
    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 # DT25013KA. 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...
  • 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...
  • Can Bulldog Lifelong Trailer Coupler Lock Part # BD580403 Be Ordered in Multiples Keyed Alike
    My contact at Bulldog advises that they do not offer their coupler lock, part # BD580403, with a keyed-alike option. They do not offer any similar locks with this option. However, since you are planning to use the lock in an alternative application (to lock your gates, rather than a trailer coupler) you may be able to use one of the other comparable products we offer. We do offer a variety of locks that are available keyed alike. For example, we offer the Fastway coupler lock, part...
    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 # DT25013KA. 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
    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...
  • 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 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...
    view full answer...

Do you have a question about this Trailer Coupler Lock?




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Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Written by:
Lindsey S
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C

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