Can I Use A Threaded Bolt And Nut To Secure Tow Bar Into RV Hitch?
Updated 12/15/2025 | Published 12/07/2025
Question:
Hello. High-security very difficult to break or drill the lockinch locking hitch pins cost $100 or more each. If I never have to remove a Roadmaster tow bar from the motorhome, what would be wrong with just using a double nutd with Loctite, 5/8inch Grade 5 bolt instead of using a locking hitch pin? Any guidance is much appreciated! Jim
asked by: Jim J
Expert Reply:
Hi Jim, good question. In theory, a 5/8-inch Grade 5 bolt with double nuts and Loctite would hold the tow bar in place, but it’s not recommended for a couple of important reasons. Hitch receivers and tow bars are designed to use a shear-strength rated hitch pin, not a threaded bolt. Bolts aren’t meant to take side-load shear the way a smooth hitch pin is, and the threads create weak points that can fatigue over time. Especially with the constant push-pull forces of flat towing.
On top of that, manufacturers like Roadmaster specify a hitch pin because it allows proper movement inside the receiver. Locking pins are expensive, but they’re still built to the correct strength and safety standards. A bolt may look secure, but it isn’t tested or rated for this application, and if anything failed you’d be way outside manufacturer specs.
So while the idea makes sense from a “set it and forget it” perspective, you’re much safer sticking with a proper hitch pin or a locking version that’s designed for towing loads.
Jim J.
12/15/2025
Jesse, Okay, I agree with all your points. However, grade 5, 5/8" bolts (i.e. Hillman) have higher shear strength ratings than even manufactured hitch pins. By using a 3 or 3.5" long bolt and flat washers in a 2 inch receiver, no threads would be exposed to shear stresses along the receiver tube or stinger ends. Also, most locking hitch pins can be easily defeated by either a grinder with a cut-off wheel or by snapping the lock end off with the leverage of a long pipe. I believe only the very expensive locking pins like those sold by PacLock or Proven Industies have designs and materials adequate enough to deter even professional theives and these cost well over a hundred bucks. It just seems to me a double nut'd grade 5 bolt would provide a good level of security with almost zero chances of failure while towing. And at a cost of less than five dollars! Please, any further thoughts? Thank you and Merry Christmas!!!
Jesse M.
12/15/2025
Product Page this Question was Asked From
Weigh Safe Hitch Receiver Locking Pin w/ Cap - 5/8" Diameter - Stainless Steel
- Trailer Hitch Lock
- Standard Pin Lock
- Keyed Unique
- Fits 2 Inch Hitch
- Fits 2-1/2 Inch Hitch
- Fits 3 Inch Hitch
- Flush Pin
- 3-7/16 Inch Span
- Weigh Safe
more information >
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Jim J.
12/8/2025
Okay, thanks Jesse!