Value Collection SNFI2031-100BX 5/16-24 Hex Slotted Lock Nut

Product Description

The VALUE COLLECTION SNFI2031-100BX is a hex slotted lock nut designed for use with 5/16-24 UNF (Unified Fine) threaded fastener assemblies. Manufactured from Grade 2 steel with a bright, uncoated finish, this nut measures 17/64 inches in height and 1/2 inch across the flats. The slotted hex profile is designed to accept a cotter pin or safety wire through a matching castle-style or grooved bolt, providing positive mechanical locking in vibration-prone applications. It is installed by electricians, plumbers, HVAC technicians, and general tradespeople in equipment assembly and maintenance work.

This slotted lock nut is suited for light-duty to medium-duty fastener applications where a secondary locking method is required. The right-hand thread and UNF pitch make it a standard fit in assemblies where fine-thread fasteners are specified for improved clamp load or thread engagement in thinner materials. Typical use cases include mechanical equipment panels, bracket assemblies, and field repairs requiring reliable thread retention.

Key Features

• Slotted hex profile accepts cotter pin or safety wire for positive mechanical locking
• 5/16-24 UNF right-hand thread for compatibility with fine-thread fastener systems
• Grade 2 steel construction for standard load-bearing applications
• Bright, uncoated finish — suitable for dry or protected indoor environments
• Height of 17/64 inches and 1/2 inch width across flats for standard hex wrench fitment
• Inch measurement system, UNF fastener standard

Compatibility

Designed for use with 5/16-24 UNF right-hand threaded bolts and studs requiring a slotted hex lock nut with a standard Grade 2 steel rating.

Installation Notes

Installation is performed using a standard 1/2 inch open-end or box wrench. Power down or de-energize any associated equipment before servicing fastener assemblies in electrical or mechanical panels. After torquing, align the nut slots with the cotter pin hole in the mating bolt before inserting the cotter pin — do not over-rotate or back off the nut to achieve alignment, as this reduces clamp load. Follow applicable equipment manufacturer torque specifications for the fastener size and grade.