APPLY TO - Round U-Bolt is good for fixing the locked object to pipe or wood, etc. Fits for trailers, plumbing, and solar panel mounting, HVAC systems, agricultural machinery, and automotive exhaust systems beyond marine use, etc.ADVANTAGE - Compared to regular hex nuts, nylon insert lock nuts provide continuous friction resistance through elastic deformation, reducing loosening risks in vibration-prone environments. They are engineered for secure pipe/tube mounting in high-vibration applications. Pre-assembled hardware kits reduce installation time compared to sourcing individual components.EXPLAIN - First, fix the locked object with U-shaped bolts, install the plate and washer, and then lock it with nuts.