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
- Search Results: spring bushings
- Video: Detailed Breakdown of the Dexter Trailer Hub and Drum Assembly for 3,500-lb Axles
- Search Results: dexter hub
- Search Results: 10" hub
- Search Results: 023 026 00
- Shop: Dexter Trailer Hub and Drum Assembly for 3,500-lb Axles - 10" Diameter - 5 on 4-1/2
- Shop: Lippert U-Bolt and Nut Kit for 3,500-lb Trailer Axles - 2-3/8" Wide
- Video: 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles: The Breakdown
- Video: Complete Breakdown of the Dexter Trailer Hub and Drum for 3,500-lb Axles
- Q&A: What is the Best Grease for Trailer Bearings
- Shop: etrailer Rust-Resistant 4-Leaf Double Eye Spring for 3.5K Trailer Axles - 25-1/4" - Dacromet
- Shop: 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/4" Long
- Shop: Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs
- Shop: Dexter Nev-R-Adjust Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3.5K
- Video: Ultimate Overview of the Replacement U-Bolt for 2-3/8" Round Axle
- Shop: Aluminum AM03 Series Gunmetal Gray Machined Trailer Wheel - 15" x 5" Rim - 5 on 4-1/2
- Video: Dexter Nev-R-Adjust Electric Trailer Brakes Review
- Q&A: Are Shackles Necessary For A Single Axle Utility Trailer?
- Q&A: What is Advantage of Never Fail Tandem Axle Suspension Upgrade Hardware Kit Over Other Options
- Q&A: How To Choose The Correct Leaf Spring U-Bolt Diameter Size On A Trailer Axle
- Q&A: Replacement Bearing Kit for 3,500 lb Dexter Torsion Axle
- Q&A: Bearing Kit Recommendation for 84 Spindle K71-717-00
- Q&A: What is a #84 Spindle and How Do I Know I Have One On My Trailer?
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Search Results: trailer tires and wheels
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Suspension Enhancement
on Lubricants Sealants Adhesives
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.