Value Collection SLI80310-100BX Hex Lock Nut 5/16-18 Grade C

Product Description

The VALUE COLLECTION SLI80310-100BX is a 5/16-18 hex lock nut with a metal insert, manufactured from Grade C steel. The metal insert provides prevailing-torque locking action, resisting loosening caused by vibration, shock, and thermal cycling. This style of lock nut is a standard fastener in mechanical assemblies across HVAC equipment, plumbing rough-in, electrical enclosures, and general trade applications. Sold in a box of 100, these nuts conform to ANSI B 18.16.3M, DIN 985, and ISO 7040 standards, making them appropriate for controlled mechanical assemblies where documented fastener standards are required.

This hex lock nut is suited for 5/16-18 UNC threaded applications in both residential and light commercial settings. Common installation scenarios include securing brackets, panels, fan assemblies, and mechanical components where vibration-resistant fastening is critical. The 5/16-18 UNC thread form is one of the most widely used inch-series thread sizes in trade work, fitting standard bolts and studs found throughout HVAC equipment frames, electrical panel supports, and pipe hanger hardware.

Key Features

• Metal insert provides positive prevailing-torque locking without damaging mating threads
• 5/16-18 UNC thread form — standard inch-series coarse thread
• Grade C steel construction for reliable strength in general mechanical applications
• Meets ANSI B 18.16.3M, DIN 985, and ISO 7040 standards
• Sold in a box of 100 for job-site and shop inventory use

Compatibility

Designed for use with any standard 5/16-18 UNC threaded bolt or stud in inch-measurement mechanical assemblies.

Installation Notes

Install using an appropriately sized hex wrench or socket. Tighten to the torque specification required by the assembly design or applicable code — do not estimate. Metal-insert prevailing-torque nuts are generally considered single-use; inspect for deformation before reusing. Follow applicable mechanical and trade codes for the specific installation type.