Value Collection 825334MSC Serrated Flange Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION 825334MSC is a fully threaded serrated flange bolt designed for secure fastening in high-load mechanical and structural assemblies. Built to Grade 8 steel with a zinc-plated finish, this bolt delivers the clamping strength and corrosion resistance required in demanding trade applications. The integrated serrated flange distributes load across a 0.68-inch flange diameter and bites into mating surfaces to resist loosening under vibration — eliminating the need for a separate washer. The hex drive head allows standard socket or wrench installation. Mechanical contractors, HVAC technicians, electricians, and equipment fabricators install this type of fastener wherever a high-strength, vibration-resistant connection is required.

This bolt is suited for light commercial and industrial equipment assembly, HVAC unit mounting, electrical enclosure fabrication, and general mechanical service work. The 5/16-18 UNC thread pattern and 1-1/4-inch length under head make it a common choice for panel mounting, bracket attachment, and equipment frame assembly where vibration loosening is a concern. It is sold individually but requires a minimum order quantity of 100 units per order.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Serrated flange bites into mating surface to resist vibration loosening without a separate washer
• Zinc-plated finish provides corrosion resistance for indoor and protected outdoor applications
• Fully threaded shank along the 1-1/4-inch length under head for maximum thread engagement
• Hex drive compatible with standard sockets and open-end wrenches
• Meets ASME B18.6.3 and SAE J429 standards for dimensional and mechanical consistency

Compatibility

Designed as a standard 5/16-18 UNC serrated flange bolt suitable for use in any application requiring a Grade 8 fully threaded hex flange fastener conforming to ASME B18.6.3 and SAE J429.

Installation Notes

Installation requires a hex socket or open-end wrench sized for a 5/16-inch hex drive. Ensure mating threads are clean and free of debris before installation. The serrated flange requires firm, consistent torque to properly seat against the clamping surface — do not use with hardened washers or plates that would prevent the serrations from engaging. Follow applicable mechanical codes and equipment manufacturer torque specifications for the assembly being serviced.