Can Nylon Lock Nuts or Blue Loctite be Used for Axle U-Bolts to Keep Them Secured
Updated 12/22/2025 | Published 10/04/2024
Question:
My keystone 5th wheel 2007. My nuts have a tendency of coming loose and cause my axel to shift. The nuts are 1/2 flange lock nuts. Should I replace with nylon lock nuts or try blue low strength locktite and retorque to 70 pounds. Or maybe double nut the u bolts
asked by: Johnny S
Expert Reply:
Hey Johnny, thanks for reaching out!
If the nuts securing the U-Bolts around your axle keep coming loose then it would be a good idea to use ones that have the lock nuts or putting some Blue Loctite # LT37643 on it to keep them secured.
What could be going on is either the U-Bolts are worn out, you're going over fairly rough terrain, or you're potentially overloading the axle. I recommend checking into those things as well.
Product Page this Question was Asked From
Loctite Blue Stick Threadlocker - Medium Strength - 1/4" to 3/4" Nut/Bolt - 0.32 Oz Stick
- Lubricants Sealants Adhesives
- Sealant
- Nut and Bolt Sealant
- 0.32 oz
- Loctite
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: Roadmaster Comfort Ride Leaf Spring Suspension Kit for CrossRoads Elevation TF3612
- Q&A: Is Loctite Required When Installing a Trailer Hitch
- Q&A: Recommended Hitch for a 2025 Toyota RAV4 Hybrid
- Q&A: Why Won't the Draw-Tite 24878 Hitch Fit the Sedan Model of the 2013 Chevy Sonic?
- Q&A: Can MORryde X-Factor and Roadmaster Comfort Ride Systems be Installed Together?
- Q&A: What is Needed to Install 8k Roadmaster Comfort Ride System on 7k 3 inch Axles
- Article: How Much Does a Boat and Trailer Weigh?
- Article: Our Team Picked The Best Camping Gear of the Year - Here Are Their Top Choices
- Q&A: What is the Correct Way to Jack Up a Boat Trailer to Change a Tire
- Article: The Definitive, Step-by-Step Flat Towing Setup Guide
- Article: Rooftop Cargo Carriers
Jameson C.
12/22/2025
Hey Johnny, how did things turn out after using the Blue Loctite on your U-bolt nuts? Did it help keep the axle from shifting on your Keystone 5th wheel? Your update could make it easier for others dealing with the same issue.