Bulldog 580405 Class III Hitch Pin Lock, 5/8 in
Bulldog 580405 Class III Hitch Pin Lock, 5/8 in — Product description
The Bulldog 580405 is a stainless steel hitch pin lock that drops into a Class III receiver and replaces the flimsy pin and clip your ball mount came with. It's a 5/8 inch dogbone lock, keyed for security, with a dust cap to keep the keyway clean. Tow your boat with one less thing to worry about at the ramp.
The Bulldog 580405 is a stainless steel receiver lock that takes the place of the standard pin and clip that came with your ball mount. Slide it through the receiver, turn the key, and your drawbar isn't going anywhere without you. It's a simple piece of gear, but it's the difference between finding your ball mount where you left it and finding an empty receiver in the launch lot.
This is a 5/8 inch dogbone lock, which is the pin size Class III and most Class IV receivers use. If your hitch takes the fatter 5/8 inch pin instead of the thinner 1/2 inch one, this is the lock you want. It won't fit the smaller Class I and Class II receivers that use a 1/2 inch pin, so check your receiver before you order.
We like the stainless steel body for anyone who tows near the water. Boat ramps, salt air, and road spray are hard on plain steel, and a rusted lock is a stuck lock. Stainless shrugs most of that off and keeps turning season after season. The included dust cap does its part too, capping the keyway so grit and spray stay out of the mechanism.
The dogbone shape spans the receiver and seats the same way your old pin did, so there's no drilling and no adapters. Push it through, snap the lock, pocket the key. That's the whole install. Keep the key on your trailer ring and you're set.
One thing to know: this is a receiver pin lock, not a coupler lock. It secures the ball mount to your tow vehicle. It doesn't lock the trailer's coupler to the ball or keep someone from hitching your trailer to their own truck. If you want to lock the coupler too, that's a separate piece. For what it does, though, this Bulldog lock is honest, simple security you'll set once and forget.
Key Features
- 5/8 inch pin diameter fits Class III and most Class IV receivers that use the standard 5/8 inch pin hole.
- Stainless steel construction resists rust and corrosion around boat ramps and salt air.
- Dogbone lock body replaces the stock hitch pin and clip and locks your ball mount into the receiver.
- Keyed lock keeps your drawbar or ball mount from walking off in a parking lot or launch area.
- Included dust cap seals the keyway against grit and road spray so the lock keeps turning.
- Sold as a single lock, ready to install with no drilling or adapters.
Why Buy from NVN Marine
- Authorized Bulldog reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Bulldog 580405 Stainless Steel Class III Hitch Pin Lock, 5/8 Inch |
|---|---|
| Brand | Bulldog |
| Manufacturer Part Number | 580405 |
| UPC | 783192025838 |
| Material | Stainless Steel |
| Fits Hitch Class | Class III |
| Pin Diameter | 5/8 Inch |
| Lock Style | Dogbone |
| Lock Type | Keyed |
| Coupler Lock | Not included (receiver pin lock only) |
| Dust Cap | Included |
| Quantity | Single |
Frequently asked questions
What size receiver does this lock fit?
It's a 5/8 inch pin lock built for Class III receivers, and it also fits most Class IV receivers that use the 5/8 inch pin hole. It won't fit the smaller Class I and Class II receivers that take a 1/2 inch pin, so check your receiver first.
Is it really stainless steel?
Yes. Bulldog builds the 580405 with a stainless steel body, which is why we like it for anyone towing near saltwater. Plain steel locks rust and seize up, and stainless holds up far better to spray and salt air.
Does this lock the trailer coupler too?
No. This is a receiver pin lock, so it secures your ball mount to the tow vehicle. It doesn't lock the trailer's coupler to the ball. If you want coupler security as well, you'll need a separate coupler lock.
What's the dust cap for?
The dust cap snaps over the keyway to keep grit, road spray, and salt out of the lock mechanism. Keep it on when you're not turning the key and the lock stays smooth a lot longer.
Do I need any tools to install it?
No tools and no drilling. It slides through the receiver the same way your old pin and clip did. Push it through, turn the key to lock, and you're done.
How many locks come in the package?
This is sold as a single lock. If you've got more than one receiver to secure, you'll want one lock for each.
