Value Collection 825154MSC Serrated Flange Bolt 1/2-13 Unc

Product Description

The VALUE COLLECTION 825154MSC is a serrated flange bolt designed for secure fastening in structural and mechanical assemblies. It features a 1/2-13 UNC thread with a 1-inch length under head and is fully threaded from bearing surface to tip. The integrated serrated flange — 1.07 inches in diameter — distributes clamping load over a wider surface area while the serrations bite into the mating surface to resist loosening under vibration. Manufactured from Grade 5 steel with a zinc-plated finish, this bolt meets ASME B18.6.3 and SAE J429 standards. Hex drive makes installation straightforward with standard hand or power tools.

This bolt is suited for general industrial, automotive, and mechanical assembly applications where vibration resistance is required without a separate lock washer. The serrated flange replaces the need for a toothed or split lock washer in many standard installations. Typical applications include equipment frames, brackets, enclosures, and mounting assemblies across manufacturing, maintenance, and repair environments. The zinc-plated finish provides basic corrosion resistance for indoor and mildly exposed conditions.

Key Features

• Serrated flange (1.07 inches diameter) distributes load and resists back-out under vibration
• Fully threaded 1/2-13 UNC, 1-inch length under head for maximum thread engagement in thin stock
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish for corrosion resistance in typical indoor environments
• Hex drive compatible with standard sockets, wrenches, and hex-drive power tools
• Conforms to ASME B18.6.3 dimensional standards

Compatibility

Designed as a standard 1/2-13 UNC serrated flange bolt for use in any application requiring an ASME B18.6.3 and SAE J429 compliant fastener with an integrated serrated flange bearing surface.

Installation Notes

Installation is performed by maintenance technicians, millwrights, or mechanical assemblers using standard hex sockets or open-end wrenches. Always verify the mating thread is clean and free of damage before installation. The serrated flange is designed to seat directly against the workpiece — do not add a flat or lock washer between the flange and the mating surface, as this defeats the anti-loosening function. Torque to the appropriate Grade 5 specification for 1/2-13 UNC as defined by your applicable engineering or maintenance standard.