Engineered for heavy-duty fastening, Heavy Hex Lock Nuts NU Nylon Inserts lock securely under dynamic loads. The nylon insert (NU) creates a locking friction that resists vibration and loosening, delivering dependable performance in challenging environments.

Constructed from steel with a zinc finish, these nuts offer robust corrosion resistance and long-lasting durability for industrial applications. The heavy hex shape provides higher torque capabilities and easier wrench engagement, making them ideal for machinery, equipment, and structural assemblies requiring reliable lock nuts.

• Locking mechanism: Nylon insert provides compact, positive locking and resists loosening due to vibration.
• Material & finish: Steel with a zinc coating for strength and corrosion resistance.
• Size: 1-3/8-6.
• Design: Heavy hex profile for enhanced torque transfer and tool clearance.

Whether you’re replacing worn hardware or assembling new equipment, these NU nylon insert lock nuts deliver secure, maintenance-free performance across a range of industrial applications.