Value Collection 825340MSC Serrated Flange Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION 825340MSC is a serrated flange bolt designed for high-strength fastening applications requiring a secure, vibration-resistant connection. The integrated serrated flange distributes clamping load across a wider bearing surface and bites into the mating material to resist loosening under vibration and dynamic loading. The bolt measures 2 inches in length under head, is fully threaded along its entire shank, and features a 5/16-18 UNC thread form. Manufactured from Grade 8 steel with a zinc-plated finish for corrosion resistance, it meets ASME B18.6.3 and SAE J429 standards. Installed by maintenance technicians, millwrights, and trade professionals across industrial, mechanical, and structural assembly work.

This bolt is suited for applications where standard hex bolts or flange bolts without serrations may back out over time due to vibration. Common use cases include equipment mounting, bracket fastening, and mechanical assembly in both residential and commercial settings. The fully threaded shank makes it adaptable for through-hole applications at varying grip lengths within its 2-inch range. The zinc-plated finish provides moderate corrosion protection for indoor or mildly humid environments.

Key Features

• Serrated flange bearing surface resists loosening under vibration without requiring a separate lock washer
• Fully threaded shank along the full 2-inch length under head
• Grade 8 steel construction for high tensile and proof load strength
• Zinc-plated finish for corrosion resistance in general-purpose environments
• Hex drive for standard socket or wrench installation
• Conforms to ASME B18.6.3 and SAE J429 standards

Compatibility

Designed as a standard 5/16-18 UNC serrated flange bolt suitable for use in any application requiring an inch-series, coarse-thread Grade 8 fastener with an integrated flange bearing surface.

Installation Notes

Installation requires a standard hex socket or open-end wrench sized for the 5/16-18 bolt head. Ensure mating threads are clean and free of debris before installation. Torque to the value specified by the equipment manufacturer or applicable fastener standard for Grade 8 fasteners at this thread size. The serrated flange is designed for use against metal bearing surfaces — avoid using against soft or coated materials where the serrations may cause damage.