Hex Lock Nuts Nylon Insert Grade C Medium Carbon Phosphate Oil 5/8-18 delivers reliable locking action with a nylon insert to resist vibration and prevent loosening in demanding assemblies. Made from Grade C medium carbon steel and finished with a phosphate oil treatment, these nuts offer strength, durability, and dependable performance across engineering and industrial applications.

Key benefits:

• Nylon insert locking mechanism provides consistent torque resistance and prevents loosening under dynamic loads.
• Grade C medium carbon steel combines toughness and strength for durable, reusable fasteners.
• Phosphate oil finish offers corrosion resistance and lubricity in challenging environments, reducing galling during installation.
• Thread size 5/8-18 UNC compatibility, designed for standard 5/8-18 fastener systems.
• Industrial-grade reliability ideal for automotive, machinery, and equipment assemblies where vibration is a concern.

Applications:

• Automotive and vehicle maintenance
• Machinery, equipment, and industrial fixtures
• General engineering and construction where secure fastening is required

Why choose this lock nut?

• Resists loosening under vibration
• Excellent durability with a robust locking nylon insert
• Corrosion resistance from phosphate oil finish
• Easy to install with standard tools