Value Collection F51NE8-101 6D Hex Lock Nut 5/8-11 Grade 8

Product Description

The VALUE COLLECTION F51NE8-101 6D is a nylon insert hex lock nut designed to resist loosening under vibration and dynamic loads. Manufactured from Grade 8 steel with a yellow zinc dichromate finish, this nut provides corrosion resistance and meets the demands of high-strength fastening applications. The nylon insert collar compresses against mating threads to create a prevailing torque lock without damaging thread form. At 49/64 inches in height with a 15/16-inch width across flats, this nut follows standard inch-series dimensions for 5/8-11 thread applications. It is installed by licensed tradespeople and maintenance professionals working in structural, mechanical, and industrial assembly contexts.

This hex lock nut is suited for residential and commercial mechanical assemblies where vibration resistance is required. The 5/8-11 unified coarse thread profile makes it compatible with standard 5/8-inch fasteners used in HVAC equipment framing, structural steel connections, and general mechanical assemblies. The right-hand thread direction is consistent with standard fastening conventions. The yellow zinc dichromate finish provides a visual identification marker and mild corrosion protection for indoor and light-duty outdoor installations.

Key Features

• Nylon insert locking style prevents loosening from vibration without thread damage
• Grade 8 steel construction provides high tensile and proof load strength
• Yellow zinc dichromate finish delivers corrosion resistance and finish identification
• 5/8-11 right-hand thread for compatibility with standard unified coarse fasteners
• 49/64 inch height and 15/16 inch width across flats match standard inch-series nut dimensions

Compatibility

Designed as an OEM-style replacement or maintenance fastener for 5/8-11 threaded rod, bolt, and stud applications in mechanical, structural, and industrial assemblies requiring a prevailing torque locking nut.

Installation Notes

Installation is performed by qualified tradespeople or mechanical assemblers using a standard combination or socket wrench sized for a 15/16-inch hex. Power down or de-energize any associated equipment before servicing fastened assemblies. Nylon insert lock nuts are intended for single-use applications in critical joints; reuse of a nylon insert nut after removal is not recommended as the locking torque is reduced. Consult applicable mechanical and structural codes for minimum engagement length and torque class requirements.