[400 BULK] Heavy Hex Lock Nuts NU Nylon Inserts Steel Zinc 3/8-16

Heavy Hex Lock Nuts NU Nylon Inserts a robust, vibration-resistant fastener engineered for secure locking in demanding assemblies. Made from steel with a zinc finish and featuring a nylon insert (NU), these nuts resist loosening under dynamic loads while delivering long-lasting performance. The 3/8-16 thread size fits common hardware, making them a versatile choice for automotive, industrial machinery, and equipment applications.

Key features

• Locking action with NU nylon insert reduces loosening due to vibration and shock.
• Heavy hex design provides greater wrenching area for easy installation and removal.
• Steel construction delivers strength and durability in tough environments.
• Zinc finish offers corrosion resistance and a clean, professional appearance.
• Thread size 3/8-16 accommodates standard fasteners used in many industries.

Specifications

• Nut type: Heavy Hex Lock Nut
• Insert: Nylon Insert (NU)
• Material: Steel
• Finish: Zinc plating
• Thread: 3/8-16 UNC

Whether you’re outfitting a repair project, fabrication line, or maintenance task, these NU nylon insert lock nuts help maintain clamping force and prevent vibration-induced loosening. Add them to your toolkit for reliable, lockable fastenings that stand up to the test of time.