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  1. Trailer Hitch Lock
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Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span

Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span

Item # BD580400
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Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span Keyed Unique BD580400
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This solid, high-strength steel, bent-pin-style hitch lock lets you secure your ball mount, bike rack, cargo carrier or other accessory to your Class III or IV trailer hitch receiver. Chrome finish guards against corrosion. 5/8" Diameter. Lowest Prices for the best trailer hitch lock from Bulldog. Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span part number BD580400 can be ordered online at or call 1-800-940-8924 for expert service.
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Bulldog Trailer Hitch Lock - BD580400

  • Fits 2 Inch Hitch
  • Fits 2-1/2 Inch Hitch
  • Standard Pin Lock
  • Keyed Unique
  • 3-1/4 Inch Span
  • Bulldog
  • Steel
  • Bent Pin

This solid, high-strength steel, bent-pin-style hitch lock lets you secure your ball mount, bike rack, cargo carrier or other accessory to your Class III or IV trailer hitch receiver. Chrome finish guards against corrosion. 5/8" Diameter.


  • Bent-pin-style trailer hitch receiver lock is used in place of standard pin and clip to prevent theft of ball mount or hitch-mounted accessory
    • Secures your bike rack, cargo carrier, hitch cover and more to your trailer hitch
  • Ball-bearing locking system provides maximum security and ease of use
    • Just pop the deadbolt onto the end of the pin and the lock will automatically engage
    • Grease ball-bearings periodically to ensure smooth operation
  • Solid steel pin 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


  • Application: Class III (2") and Class IV (2-1/2") trailer hitch receivers
  • Inside pin length (span): 3-1/4"
  • Pin diameter: 5/8"
  • Limited 1-year warranty

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

This ball-bearing system also ensures that the structural integrity of the pin is maintained throughout. A typical padlock-style hitch lock has a significant taper at the end of the pin where the lock snaps into place. This taper weakens the pin, making it easier to break or cut. Because the ball bearings are responsible for engaging the lock on this Lifelong lock, no taper is needed. So, the pin diameter is the same along the entire length of the lock. The result is a hitch lock that is strong, durable and highly tamper resistant.

580400 Bulldog Life Long Bent Shank Hitch Lock for 2" Hitches

California residents: click here

Video of Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Bulldog Hitch Locks - Standard Pin Lock - BD580400 Review

Today, we'll be reviewing part number BD580400. This is the Bulldog Lifelong trailer hitch receiver lock for 2-inch hitches. The bent pin-style trailer hitch receiver lock is used in place of your standard pin and clip to help prevent theft of a ball mount or hitch mount accessory. It's going to allow you to secure your accessory successfully inside of your trailer hitch. The ball bearing lock system provides maximum security and ease of use. All you need to do is pop the deadbolt onto the end of the pin, and the lock engages automatically simply just by pushing down on this portion here. Then to disengage that, simply take one of the two keys, twist it until that end pops back out, and then, the lock is disengaged from the pin. The solid steel pin offers superior strength and durability, has a nice chrome plating so it is going to resist rust and corrosion. This system also features a plastic cap that covers the key slot to help prevent corrosion in the locking mechanism. It comes with two high-security square keys.

Again, this is designed to work with a 2-inch x 2-inch trailer hitch receiver. The pin diameter is going to be 5/8 inch, and the span of the pin from the lock mechanism to the bend is going to be 3-1/4 inches. Now, we'll go ahead and show you how this would work. We have our hitch here, and we want to secure our ball mount today, so we'll place that inside the hitch until our pin holes are in line with each other. Then, we'll take our pin and place it through. We can take our lock and place it on the other side, push in to secure it in place, and then install the dust cap. Just like that, everything is installed and we're ready to go. That's going to do it for today's review of the part number BD580400.

That's the Bulldog trailer hitch receiver lock for 2-inch hitches. .

Customer Reviews

Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span - BD580400

Average Customer Rating:  4.7 out of 5 stars   (394 Customer Reviews)

This solid, high-strength steel, bent-pin-style hitch lock lets you secure your ball mount, bike rack, cargo carrier or other accessory to your Class III or IV trailer hitch receiver. Chrome finish guards against corrosion. 5/8" Diameter.


Each and every product that I purchased was a perfect fit. The installation was simple but the quality of the parts are second to none. The staff was incredibly helpful from the time I ordered to the time my products were delivered. I would recommend etrailer to everyone interested in getting Quality Parts, with very fast shipping, and your part it's going to fit each and every time. Thank you, Ted


Easy to use. We though it was a great idea that there is a soft plastic cover to keep grit from getting into the lock. We have greater confidence when we travel knowing our hitch is secure. Great product & good price.


I ordered this locking pin because it looked to be the strongest available. I've used others that I've never really trusted because they were hollow with a solid shaft inside or either the locking mechanism or opposite end seemed weak. This one is solid and it seems the lock will hold. The description claims it is "supremely easy to use". I found this to be a bit optimistic and it takes a little juggling to hold the shaft and the the locking mechanism still and push the pin in while holding the key in the unlock position but it is easier than some. My only real complaint is that the plastic cap that fits over the keyhole fits loosely and will probably come off right away. A little retaining strap would at least keep it from getting lost when it comes off. Other than that, this locking hitch pin is a great buy and I recommend it.


I ordered this trailer hitch lock from Great, fast service and delivery. Seems like a fine product.


Tha Bulldog trailer hitch lock I purchased works great. The quality and sturdiness match the reviews! It works much better than the other locks I have tried. Not only am I happy with my purchase but also happy with the purchasing process at etrailer. Knowledgeable and courteous! You rarely find that kind of service anymore.


Outstanding! I don't give out 100% to just anyone or anything. This little bugger is way better that others I've had in the past. Shipping was FREE because I needed the trailer hitch receiver as well. 3 Business days!


Rubber cover for the key lock is rather clumsy. Not sure if it’s a temporary cover For packaging or supposed to be used during the life of the product. Otherwise great product


Appears to be nice quality and fits perfect on my 2011 Tacoma. Plastic end cap doesn't fit very tight and I'm sure will come off in time. Always a pleasure doing business with etrailer


works well. like that it has a rubber piece on end to guard the lock against rain. its long enough to also use with a pin to secure - wish it had both options in case you didn't want to lock it always.


Well made. Longer span of 3 1/4 is essential for newer Toyota Sequoia 2x2 receiver hitches.


Quick, fast, and always reliable if a question or concern.


This receiver lock is everything it's advertised to be. Everything about it is heavy duty and high quality. Really good deal.


Got this to protect a unique trailer hitch cover from theft. Works great.


Fit my 2014 RAM 2500 perfectly. Good O-ring seal. A solid hitch lock.


Great piece of kit. I just got it but I'm sure it will last. No worries about the cover either. I had a tough time working it off mine so it is well sealed, not just a slip off piece of plastic, but a conforming rubber cap. I finally figured out just to act like I didn't care and it came off and went back several times.


The pin look to be good but the lock portion of the pin is tough to unlock and like back


Great product for security of my traile rs..


I like the product.


The quality is top notch and the delivery time was short.


Works great just like advertised



Fits great. Great price


Exactly as described and shown on the website. Happy with this purchase.


Exactly what I ordered.


Seems to be secure. In place and ready for the trip. Will check back later.

Show More Reviews

Ask the Experts about this Bulldog Trailer Hitch Lock

  • Locking Pin for Curt Hitch on 2016 Cadillac SRX
    A hitch receiver lock that would work with the tabs that are welded underneath Curt hitch # C13002 is Bulldog Lifelong Trailer Hitch Receiver Lock # BD580400, a popular option because of its easy to use ball-bearing locking system.
    view full answer...
    Image 1 for
  • Hitch Recommendation for a 2015 Lincoln MKZ
    The Draw Tite Hitch part # 24897 that you referenced is confirmed to fit your 2015 Lincoln MKZ and would work well. If you were looking for a bike rack to go along with this hitch I would recommend the Swagman XTC part # S64670. This is a great rack that has been highly reviewed by our customers. Check out the review video I attached.
    view full answer...
  • Stainless Steel Locking Hitch Pin that Has 3 Inch Usable Span
    We have hitch lock # BD580400 which is chrome plated steel, not stainless, but has a span of 3-1/4 inches. And then we have lock set # AM3493 which is stainless steel, aluminum, zinc alloy, and steel for nearly 100 percent rust free corrosion resistance. The larger lock has a span of 3-5/16 inches. The shorter one only 1-7/8 inches.
    view full answer...
  • Locking Hitch Pin Recommendation for 2000 Dodge Dakota Using Ericson Load Extender # EM07605
    I am glad your Curt Hitch and Erickson Big Bed Junior Load Extender part # EM07605 are working well on your 2000 Dodge Dakota! For locking hitch pins that you could use on the hitch and the # EM07605 you could use the part # e98880 for the hitch and then the part # BD580400 for the upright portion of the # EM07605.
    view full answer...
  • Recommended Hitch for 2011 Cadillac SRX
    There are Class II and Class III hitches available for your SRX. I'd recommend going with a Class III hitch because it's more common and there's more accessories available for the 2 inch Class III receiver. I'd recommend the Curt Class III, part # C13002. This hitch has a higher capacity than the other hitches, but you might be limited by the towing capacity of your vehicle. Consult your owner's manual for specifics. This hitch is actually the lowest-priced of the Class III options, but...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Noah M
Updated by:
Noah M
Employee Cole B
Installed by:
Cole B
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video Edited:
Chris R

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