Value Collection 825344MSC Serrated Flange Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION 825344MSC is a serrated flange bolt designed for secure fastening in structural and mechanical assemblies. It features a 5/16-18 UNC thread with a 3/4-inch length under head and is fully threaded from head to tip. The integrated serrated flange measures 0.68 inches in diameter, distributing clamp load across a wider bearing surface while the serrations resist loosening under vibration. Manufactured from Grade 8 steel with a zinc-plated finish, this bolt meets ASME B18.6.3 and SAE J429 standards. It is driven with a hex tool and suits applications where a separate washer is not practical or desired.

This bolt is suited for use in automotive, industrial, and mechanical assembly applications where vibration resistance and high tensile strength are required. The serrated flange face bites into the mating surface to prevent rotation and back-off without an additional locking element. It is typically installed by machinists, maintenance technicians, and assembly line workers dealing with steel-on-steel joints, brackets, enclosures, and frame connections. The zinc plating provides baseline corrosion resistance for indoor and light-duty outdoor use.

Key Features

• Serrated flange diameter of 0.68 inches distributes load and locks against loosening
• Fully threaded 5/16-18 UNC shank allows engagement at any position along the thread length
• Grade 8 steel construction provides high tensile and proof load strength
• Zinc-plated finish offers corrosion resistance for general-use environments
• Hex drive head works with standard sockets and wrenches
• Meets ASME B18.6.3 and SAE J429 dimensional and mechanical standards

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 per ASME B18.6.3 and SAE J429 specifications.

Installation Notes

Install using a hex socket or open-end wrench sized for a standard 5/16-inch hex flange bolt head. Ensure mating threads are clean and free of debris before installation. De-energize or lock out any equipment before fastener service on live machinery per applicable safety codes. Do not overtighten; follow the torque specifications provided by the equipment manufacturer for 5/16-18 Grade 8 fasteners in the specific joint application.