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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 Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock - Chrome
Bulldog

Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock - Chrome

Part Number: BD580404
In Stock
$41.76
Retail:$57.81
You Save: 28%
Trailer Tongue Lock
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Combo pack offers theft protection for your trailer with the butterfly-style coupler lock and secures a ball mount or hitch accessory with the receiver lock. Chrome-plated steel resists rust. Ball-bearing locking mechanisms provide extra security. Great Prices for the best trailer tongue lock from Bulldog. Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock - Chrome part number BD580404 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Bulldog Trailer Tongue Lock - BD580404

Highlights

  • Comprehensive anti-theft solution: Protects both your trailer and hitch with keyed-alike locks.
  • Robust build quality: Chrome-plated steel ensures rust resistance and prolonged durability.
  • High-security ball bearings: Unique design resists tampering and maintains pin strength.
  • Universal application: Fits 2" trailer hitch receivers and trigger-latch-style ball couplers.
  • Smooth engagement: Easy-to-use ball-bearing system for automatic lock engagement.
  • Secure locking mechanism: Comes with two high-security square keys for peace of mind.

Features to know about

Effortless Security for Your Trailer: Ball-Bearing Locking Mechanisms

Keeping your trailer secure has never been easier with the ball-bearing locking mechanisms of the Bulldog Lifelong Trigger-Style Coupler Lock and 2" Hitch Receiver Lock. These locks engage smoothly and securely without the need for a taper, which often weakens standard locks. Just pop the deadbolt onto the pin, and the ball bearings automatically engage—ensuring maximum security and ease of use without compromising the structural integrity.

Universal Application with Unique Keyed Design: Fits Most Couplers and Prevents Unauthorized Access

The Bulldog lock set is designed for universal application, fitting a variety of couplers including trigger-latch-style ball couplers. Its keyed unique design means no two locks share the same key, providing a personalized security solution. The hitch receiver lock features a 2-1/2" span with a 5/8" pin diameter, making it versatile and suitable for most standard hitch receivers.

Durable in All Conditions: Chrome-Plated Steel Construction

Don't let rust and weather weaken your trailer's defenses. The Bulldog locks boast a solid steel construction with a chrome-plated finish that effectively resists rust and corrosion. This ensures lasting durability and optimal functionality in various weather conditions, so you can rely on it regardless of where your travels take you.

Convenient and Secure Coupler Attachment: Innovative Trigger-Latch Style

Ensure your trailer stays exactly where you leave it with the trigger-latch-style coupler lock. This lock prevents your trailer from being hijacked or detached when securely fastened to your tow vehicle. When the coupler lock is engaged, would-be thieves can't connect your unhitched trailer to another vehicle, giving you peace of mind when you're away.

Complete Lock Package: Includes High-Security Square Keys

Forget about juggling multiple keys—this lock set comes with two high-security, square keys that fit both the coupler and hitch locks. The square keys engage effortlessly, and their unique design means they're less likely to bend or break. The integrated plastic caps protect the key slots from dirt and grime, ensuring long-term usability and reliability.

Better Than the Rest: Ball-Bearing System Innovation

Traditional locks often suffer from weakened points due to design flaws like tapers. The Bulldog lock set circumvents this vulnerability entirely with its ball-bearing system that maintains uniform pin diameter along its length, resisting tampering and cutting efforts. This strengthens the locking system, making it robust against attempts to breach security.

Specs

Coupler Lock

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

Hitch Receiver Lock

  • Application: 2" x 2" trailer hitch receivers
  • Inside pin length (span): 2-1/2"
  • Pin diameter: 5/8"

Warranty

  • Limited 1-year warranty

580404 Bulldog Life Long Combo Lock Set - Coupler Lock for Trigger-Style Couplers and Dogbone-Style Hitch Lock




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Customer Satisfaction Score:

Ratings & Reviews

4.3

240 reviews
Combo pack offers theft protection for your trailer with the butterfly-style coupler lock and secures a ball mount or hitch accessory with the receiver lock. Chrome-plated steel resists rust. Ball-bearing locking mechanisms provide extra security.

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See what our Experts say about this Bulldog Trailer Tongue Lock

  • Solution for Lost Keys to Bulldog Hitch Lock
    If you no longer have the keys for your existing Bulldog Coupler Lock, unfortunately there is no identifiable information on the lock itself that will refer to the matching key number. Your best option will be to simply replace the entire lock assembly. I recommend looking at the Bulldog Lifelong Trigger-Style Coupler Lock and 2 Inch Trailer Hitch Receiver Lock # BD580404. This kit will includes both a coupler and hitch lock to secure your valuables. It includes 2 high-security square...
    view full answer...
  • Recommended Tow Dolly for 2007 Toyota Prius behind 2017 Toyota Sienna
    The tongue weight of a tow dolly is minimal because it has the weight of the front of the tow vehicle across the axle. So you will have almost no tongue weight when using the Roadmaster Tow Dolly with Electric Brakes # RM-2050-1. You will simply need to account for the towing weight of the 545 lb # RM-2050-1 along with the 2,932 lbs curb weight of your 2007 Toyota Prius. Your 2017 Toyota Sienna has a towing capacity of 3,500 lbs, so you can use the # RM-2050-1 and be just under your...
    view full answer...
  • Hitch and Coupler Lock Recommendation for PortaChopper Trailer with Trigger Latch Coupler
    Could I see a picture of your coupler by chance? We have the Bulldog Lifelong Trigger-Style Coupler Lock # BD580404 which comes with a trigger lock and a 5/8 inch diameter coupler lock that has a usable span of 2-1/2 inches, but without more info on your coupler it's hard to say if that would be ideal.
    view full answer...
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  • Recommended Trailer Hitch Receiver and Coupler Locks For a 2020 Toyota Tundra
    I recommend the BOLT Trailer Hitch Receiver Lock # BL7023584 and BOLT Trailer Coupler Lock # BL7025289 for your 2020 Toyota Tundra. These locks will key to your Toyota edge cut key(see diagram), it will not work if you have a center cut key. The Receiver Lock # BL7023584 is 5/8" in diameter with a 3.55" inside length. The Coupler Lock # BL7025289 has a 5/16" diameter and is adjustable to lock from 1/2" to 3-3/8". If you have the center cut key the Blue Ox Hitch Receiver and Coupler...
    view full answer...
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  • Recommendation for a Trailer Hitch and Coupler Lock Set that Can be Keyed Alike
    Bulldog does not offer the Lifelong Trigger-Style Coupler Lock and Hitch Lock Combo, # BD580404, with a keyed alike option. The two locks included with this kit will be keyed alike and replacement keys are available using part # CKEY-FS, but they do not sell additional sets with the same lock cores. For a lock set that can be keyed alike, you may want to take a look at the etrailer Hitch and Coupler Lock Set, # e99039. You can purchase as many sets of these as you would like keyed alike...
    view full answer...
  • How To Operate the Bulldog CCP Trigger-Style Coupler Lock
    It sounds like you might have the Bulldog Lifelong Trigger-Style Coupler Lock part # BD580404 and if that is the case then I have attached for a you a review video on how to operate the lock. That said, if the lock has been on for six years without being removed then odds are it is stuck and will be very hard to remove as rust can form and dirt can get inside over time which can then make for them to be very difficult to operate. If that is the case then you will need to either cut the...
    view full answer...
  • How to Remove a Stuck Bulldog Locking Hitch Pin from Trailer Hitch
    Sounds like the internal ball-bearings on your Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock, # BD580404, may be stuck. Try using a penetrating spray lubricant, like the UltraLube Biobased Spray Lubricant and Penetrant. The spray lubricant will penetrate to the locks bearing and help break up any contaminates that may be causing the lock to stick. Plus, the spray will make separating the lock easier due to lowering the surface resistance of the metal lock.
    view full answer...
  • Troubleshooting Stuck Bulldog Lifelong Hitch Lock # BD580404
    Most likely the internal ball-bearings used to secure and release the pin for your Bulldog Lifelong Hitch Receiver Lock # BD580404 are simply stuck due to some corrosion or debris. Even when trying your best to protect a lock like this from the elements using the provided cap, moisture can be pretty persistent in finding a hard-to-reach access point. What I recommend doing is just using some kind of penetrating spray lubricant both inside the key slot and around the barrel where the pin...
    view full answer...
  • Lock Cylinder Won't Release on the Trailer Hitch Receiver Lock Part # BD580404
    It sounds like the ball plunger on the shaft of the Bulldog Trailer Hitch Receiver Lock part # BD580404 has become seized up which would either be from rust of dirt/grime. In order to free the lock cylinder you will want to try tapping it with a hammer while rotating it back and forth if possible. You may then also need to latch onto the lock cylinder with a pair of vice grips and use some heat in order to remove it. I recommend applying some grease to the ball plunger before reinserting...
    view full answer...
    Image 1 for
  • How to Correct Lock that Seized from Salt Exposure
    Salt is brutal on steel, especially surfaces that you cannot easily see and keep clean, such as the internal parts of a lock. Regular applications of an anti-corrosive like PB Blaster on a new lock can help prevent some of this deterioration but if the lock didn't get this routine "TLC" and is now seized you may be able to dissolve the corrosion but it may take a few applications and some patience while the solvent works. Apply the spray solvent to the key hole. Try to get as much of the...
    view full answer...
  • Replacing Lost Key To Bulldog Hitch Lock
    I have a solution for you, but we do not carry replacement keys for the Bulldog Trigger Style Coupler Lock # BD580404 . The way you would determine the correct replacement key would be with what is usually a 3 digit number engraved or marked on the side of the lock; these models usually had a CCP on one side and LB### marked on the other which would give you the key number. If you can't find a replacement key, I recommend replacing this with a Master Lock Trigger Style Coupler Lock # 605DAT...
    view full answer...
  • Troubleshooting A Non Turning Bulldog Lifelong Hitch Lock
    It sounds like the internal ball bearings that are used to secure and release the pin for your Bulldog Hitch Receiver Lock # BD580404 are stuck due to some type of corrosion or debris. Even with the provided cap , moisture can sometimes get into the hard to reach access points. I would recommend using some kind of penetrating spray and lubricate both the key slot and also around the barrel where the pin will release. Let it sit for a couple minutes and then try putting the key into the...
    view full answer...
  • Troubleshooting Key That Won't Fit Inside Bulldog CCP Hitch Lock
    If you're having trouble getting the key to fit completely inside the lock core of your Bulldog Hitch Lock like # BD580404 then there might be some corrosion/debris built up inside that just needs to be cleaned out. I recommend trying to spray some lubricant like WD40 inside the lock and letting it sit for a bit. You may want to repeat this process a few times while sliding the key in to try and lubricate the mechanism. Hopefully this will clean out the lock so that it will work again....
    view full answer...
  • Availability of a 3-Piece Keyed-Alike Lock Set for Hitch, Coupler and Bikes
    We do offer a range of keyed-alike lock sets such as the Bulldog Lifelong Trigger-Style Coupler Lock and 2-Inch Trailer Hitch Receiver Lock Set # BD580404. This two-piece set does not include a bike cable lock, however. We do not carry any such 3-piece set, but we can offer you separate cable locks for the bike. For example, we offer the 10-Foot Cable Lock # e98891, the Tow Ready 4-foot Vinyl Coated Steel Cable Lock # TR63255. Video link is attached for your reference.
    view full answer...
  • Recommended Weight Distribution System for 2018 Shasta Oasis 18BH Travel Trailer
    Your 2018 Shasta Oasis 18BH has a hitch weight of 349 lbs dry weight. When you look for a compatible weight distribution system, you want to consider the total tongue weight of your system. This includes the loaded tongue weight of your trailer as well as any cargo behind the rear axle of your towing vehicle. Each weight distribution system will have a range that is allowed for this total tongue weight rating and we just want to fall within that range. For your application, I recommend...
    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 Hitch Adapter To Expand Hitch On 2015 Ford C-Max
    For the Yakima Rack and Roll Trailer - 66" # Y08106, you will only need a 2 inch ball that you already have with your Weigh Safe adjustable ball mount. The adapter for the trailer hitch on your 2015 Ford C-Max I recommend is the Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6 Long # C45785. This will reduce your hitch receiver's tongue weight capacity by 50%. Based on the application, this should not be an issue, but this would not be wise for any larger application. To...
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  • 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...
  • Recommended Equipment Needed to Lock Boat Trailer to 2013 Ranger Trail
    If you already have a hitch receiver lock then you can use a coupler lock, like our etrailer.com part # e98888 that you referenced, to deter theft of your trailer. However, if you do not already have a hitch receiver lock then I recommend using something like the Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock # BD580404 instead. This will help to deter someone from simply removing your ball mount to steal your boat trailer. The receiver lock is compatible...
    view full answer...
  • Recommendation for Class V Hitch Lock and Coupler Lock
    There are many hitch receiver sizes available in Class V. For a 2 inch receiver, I recommend the Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock - Chrome # BD580404 to give you both the hitch lock and the trigger coupler lock. For a 2-1/2 inch receiver, I recommend the Trailer Hitch Receiver Lock - Extra Long - Flush Design for 2-1/2" Trailer Hitches # e98881. With either of these options, I recommend the Master Lock Heavy-Duty Coupler for 1-7/8", 2",...
    view full answer...
  • What Material is the Trailer Coupler Latch Lock # 2878DAT Made From
    The 7/8" Wide Trailer Coupler Latch Lock # 2878DAT is made of hardened steel. As far as how easy it is to defeat, ultimately any lock can be defeated given enough time and the right tools. Since there is no gauge of how "breakeable" a specific lock is, we recommend making your setup look intimidating to deter would-be thieves. If you are wanting to deter theft of your trailer when it is coupled then the Bulldog # BD580404 is a great option because it has a coupler lock and a ball mount...
    view full answer...
  • Which Receiver and Trigger Lock for 2" Receiver and Wesco Trailer with Trigger Latch Coupler
    Since your 2015 Mercedes Benz GLA-Class has a 2" hitch receiver, the Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock # BD580404 will fit on your hitch as long as the outside measurements on the tube are not greater than 2-1/2". When it comes to the coupler lock, as long as the trigger-latch on your coupler is not wider than 3/4", the included coupler lock will also work on your Wesco trailer (this is the most common trigger latch size). These locks are designed...
    view full answer...
  • Looking for a Lock Set Up to Secure my Trailer to My Truck so No One Can Unlatch and Steal
    Hello Edward. In todays world, you can never be too safe! I am not sure what kind of coupler you have on your trailer, or what size receiver you have on your truck. The Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock - Chrome # BD580404 is a great set up. It will come with a hitch pin lock that will secure your ball to your truck, and then it comes with a trigger style latch lock for you to be able to lock the coupler on your trailer. There are so many...
    view full answer...
  • Recommended Trailer Hitch Pin Lock for 1-1/4 Inch Hitch With Matching Trailer Coupler Pin Lock
    In order to obtain a trailer hitch pin lock for 1-1/4" hitches as well as a trailer coupler pin lock that uses the same key you will have to use the etrailer.com Trailer Hitch Receiver Lock part # e98879 and etrailer.com Trailer Coupler Lock part # e98889. If these two locks are both ordered at the same time and you select the keyed alike option then they will both come with the same key, The Bulldog Lifelong Trigger-Style Coupler Lock and 2" Trailer Hitch Receiver Lock part # BD580404...
    view full answer...


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