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Secure your fifth-wheel camper or utility trailer with this heavy-duty, hardened steel king pin lock. Fits over your trailer's king pin to prevent towaway theft. Full collar keeps your hands grease-free during installation.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
If you have a fifth wheel, whether it's like this for your camping and stuff, or if you're just a big commercial worker hauling around big stuff and delivering bigger loads, Trimax has got you covered. This is going to lock it up whenever you're leaving it somewhere and storing it. So let's show you exactly how it works. Doesn't matter what kind of fifth wheel that you have, it's going to fit. This is a very, very standard size, and it's super easy to use. All you gotta do is just grab it, and you don't even need the keys to lock it in.
So you just push it up like this. The collar design keeps your hands free of grease. You push that in, and that's it. This is the best way to lock up your fifth wheel. We have a hardened steel, which is epoxy powder-coated so it's not gonna rust away over time.
It has a circular key, which we get two in our kit. It's gonna be very, very tamper-proof. I don't see anybody having this skill to be able to pick this lock. It's just super easy, and I do like how you don't need the keys to lock it up. It's a very compact design.
There's so many different places we can store it on our fifth wheel, but also just the glove box or center console of your vehicle, it's gonna fit. I think this is just the best way to do it. Good keys, good locks, good sturdy material. Nice powder-coated finish. There isn't a whole lot to it, but that's pretty much it for our look at the Trimax 5th Wheel Lock..
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Kate F.
11/19/2025
Glad we had the right lock to keep your property safe Jim! Looks great =)
Thomas
5/7/2024
Still is working well no problem with the locking mechanism at all. It is a good visual deterrent as well.
Lazer S.
5/13/2026
Sorry to hear it didn't work for you, Gary. Did the capture plate make it so the lock wouldn't go all the way on? Would definitely like to get that added to this page if it's the case.
Nettie
9/24/2023
Still love this lock. We have peace of mind knowing our trailer is safe and secured
Do you have a question about this King Pin Lock?
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Nick S.
1/9/2026
That is great to hear, and it looks clean installed! I agree the steel is definitely a stronger feeling unit and I think it will prove that over time. What kind of trailer are you using this on?