Value Collection 440008 Hex Lock Nut 5/8-11 Grade 2 Steel

Product Description

The VALUE COLLECTION 440008 is a 5/8-11 hex lock nut with an expanding flex top locking style, designed for secure fastening in applications where vibration resistance is critical. Manufactured from Grade 2 steel with a cadmium finish for corrosion protection, this nut features right-hand threading and a flanged seat measuring 0.9280 inches in flange diameter. The hex body measures 15/16 inches (0.9375 inches) across the flats and 1.0590 inches across the points, with a height of 0.7590 inches. It meets MIL-S-7742 military specifications, making it appropriate for defense, industrial, and demanding mechanical assembly applications. Installed by maintenance technicians, millwrights, and general contractors in metal fabrication and structural fastening work.

This hex lock nut is suited for use in residential, commercial, and military-grade mechanical assemblies requiring a reliable threaded connection at the 5/8-11 thread size. The expanding flex top design provides consistent locking force without the need for additional locking hardware such as separate lock washers. It is commonly used in structural, equipment mounting, and general mechanical assembly scenarios where vibration or dynamic loading could otherwise allow fastener loosening over time.

Key Features

• Expanding flex top locking style provides vibration-resistant hold without separate lock washers
• Grade 2 steel construction with cadmium finish for corrosion resistance
• Meets MIL-S-7742 military specification for demanding applications
• Right-hand, 2B thread fit class ensures standard compatibility with 5/8-11 threaded fasteners
• Flanged seat aids load distribution across mating surfaces
• Sold in packages of 25 with a minimum order quantity of 1

Compatibility

Designed for use with standard 5/8-11 UNC right-hand threaded bolts and studs in inch-measurement fastening systems.

Installation Notes

Installation is performed with a standard hex wrench or socket sized to 15/16 inches across the flats. Ensure mating bolt or stud threads are clean and free of debris before installation. De-energize or lock out any equipment before servicing fastened assemblies per applicable safety procedures. Do not reuse expanding flex top lock nuts after removal, as the locking mechanism may be compromised.