Value Collection 825130MSC Serrated Flange Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION 825130MSC is a serrated flange bolt designed for mechanical fastening applications requiring a secure, vibration-resistant joint. Threaded to the 3/8-16 UNC standard and fully threaded along its 2-3/4 inch length under head, this bolt integrates a built-in serrated flange that bites into the mating surface to resist loosening without a separate washer. The 0.81 inch flange diameter distributes clamp load evenly. Manufactured from Grade 5 steel with a zinc-plated finish, it meets ASME B18.6.3 and SAE J429 standards. Electricians, HVAC installers, plumbers, and general mechanical contractors will find this fastener suited to equipment assembly and structural attachment tasks.

This bolt is appropriate for use in light-to-medium duty mechanical assemblies, equipment mounting, and structural connections where vibration resistance is a priority. The serrated flange face engages sheet metal, structural steel, and machined surfaces to maintain clamp load in high-vibration environments such as HVAC unit frames, electrical enclosures, and mechanical equipment bases. The zinc-plated finish provides basic corrosion resistance for indoor and mildly exposed outdoor installations.

Key Features

• Fully threaded 3/8-16 UNC shank provides maximum thread engagement across the full 2-3/4 inch length under head
• Serrated flange face resists loosening under vibration without requiring a separate lock washer
• 0.81 inch flange diameter spreads clamp load over a wider bearing area than a standard hex head
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides basic corrosion resistance for general service environments
• Conforms to ASME B18.6.3 dimensional standards for consistent fit and interchangeability

Compatibility

Designed as a standard 3/8-16 UNC serrated flange bolt for use in any application requiring a Grade 5 hex flange fastener conforming to ASME B18.6.3 and SAE J429 specifications.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for a 3/8-16 UNC hex flange bolt head. Power down or de-energize equipment before fastening electrical enclosures or HVAC components. The serrated flange is designed to seat against a flat, clean mating surface - do not stack additional washers under the flange, as this defeats the anti-loosening function. Follow applicable torque guidelines from the equipment manufacturer or relevant mechanical codes for Grade 5 fasteners in the specific application.