Hillman Fasteners 829722 5/16-18 Nylon Insert Lock Nut 50 Pack

Product Description

The HILLMAN FASTENERS 829722 is a 50-pack of 5/16-18 stainless steel nylon insert lock nuts with coarse threading. Each nut features a nylon collar insert that compresses against the bolt threads to resist loosening from vibration, thermal cycling, and mechanical stress. The stainless steel construction provides corrosion resistance in wet, outdoor, or chemically exposed environments. These lock nuts are a standard fastener solution used across HVAC, plumbing, electrical, and general mechanical assemblies wherever a secure, reusable threaded connection is required.

This pack is suited for residential and light commercial applications where 5/16-18 UNC coarse thread fasteners are specified. Common install scenarios include equipment mounting, bracket hardware, panel assembly, and pipe support systems. The 50-count pack is appropriate for service vans and shop stock where this thread size sees regular use. Technicians in HVAC, plumbing, and electrical trades will find this size common in structural and equipment-mounting hardware.

Key Features

• Nylon insert collar locks against bolt threads to resist vibration-induced loosening
• Stainless steel construction resists corrosion in damp and outdoor service environments
• 5/16-18 UNC coarse thread for broad fastener compatibility
• 50-count pack provides bulk quantity for shop stock or field service kits
• Reusable design allows controlled disassembly without damaging the nylon insert on first use

Compatibility

Designed as a standard 5/16-18 UNC coarse thread nylon insert lock nut for use with any 5/16-18 threaded bolt or stud requiring a prevailing-torque locking fastener.

Installation Notes

Installation requires no special tools beyond a standard wrench or socket set. Ensure the mating bolt is clean and free of debris before threading the lock nut to engage the nylon insert properly. Nylon insert lock nuts are rated for single or limited reuse — inspect the nylon collar for wear or deformation before reinstalling a previously used nut. Follow applicable mechanical and structural codes for torque and fastener specifications on the equipment being serviced.