How Does the AMPLock Strong Series King Pin Lock Protect a Fifth Wheel from Theft?

Published 11/07/2026

Question:

My wife and I have a fifth wheel camper that we keep in an outdoor storage lot when were not traveling. Weve never had any trouble there, but lately Ive been thinking about how easy it would be for someone to back a truck up and hook onto our trailer while were away. I came across the AMPLock Strong Series King Pin Lock AMP85FR and wondered how secure it really is. Does it completely cover the king pin so someone cant hook up to it, and is it something I can put on quickly without having to mess with a key every time we park the camper?

asked by: Dennis

Expert Reply:

Hey Dennis! Yes, the AMPLock Strong Series King Pin Lock part # AMP85FR covers your fifth wheel's king pin so someone can't simply back up, hook onto your camper, and drive away. It's made from heavy duty ductile cast iron, so it's built to put up a fight against someone trying to tamper with it. It also has a disc lock cylinder that's designed to resist picking, which is a nice added layer of protection when your camper is sitting in storage.

And I think you'll really appreciate how easy this one is to use! You don't even need your key to lock it. Just position it over the king pin and push the locking mechanism into place. That's it! You'll only need the key when you're ready to unlock it, and AMPLock includes two keys so you've got a spare. It also has a protective coating to help keep rust and corrosion at bay while it's sitting outside. Now, no lock can guarantee someone won't try to steal your trailer, but this one makes it a whole lot harder for someone to simply hook up and take off.

Is your fifth wheel stored outside year round, or do you bring it home between trips?

expert reply by: Heather A