Value Collection KP24739 Serrated Flange Bolt 3/8-16 Unc

Product Description

The VALUE COLLECTION KP24739 is a serrated flange bolt designed for secure fastening in mechanical, structural, and general industrial assemblies. The integrated serrated flange distributes load across a wider surface area and bites into the mating surface to resist loosening under vibration. The bolt features a 3/8-16 UNC thread, is fully threaded along its 1/2 inch length under head, and has a flange diameter of 0.81 inches. Made from Grade 5 steel with a zinc-plated finish, it meets ASME B18.6.3 and SAE J429 standards. Installation uses a standard hex drive. These are sold in a pack of 50.

This bolt is suited for applications where vibration resistance and load distribution are priorities. Common install scenarios include equipment mounting, fabricated frames, automotive assemblies, and general mechanical fastening where a separate washer would be inconvenient or impractical. The 3/8-16 UNC thread is one of the most widely used coarse-thread sizes in inch-system fastening, making this bolt a practical stock item for shops, maintenance crews, and field technicians working on a broad range of equipment.

Key Features

• Serrated flange provides built-in vibration resistance without a separate lock washer
• Fully threaded 1/2 inch length under head for maximum thread engagement in thin materials
• 0.81 inch flange diameter distributes clamping load over a wider bearing surface
• Grade 5 steel construction meets SAE J429 mechanical requirements
• Zinc-plated finish provides basic corrosion resistance for indoor and light-duty applications
• Conforms to ASME B18.6.3 dimensional standards
• Pack of 50 for shop stocking or project quantities

Compatibility

Designed for use in standard 3/8-16 UNC tapped holes or with matching 3/8-16 hex nuts in inch-system assemblies requiring a serrated flange fastener per ASME B18.6.3 and SAE J429.

Installation Notes

Install using a standard hex wrench or socket driver sized for the hex head. Ensure mating threads are clean and free of debris before installation. The serrated flange is designed to seat directly against the workpiece surface — do not use an additional flat or lock washer between the flange and the mating surface, as this will defeat the anti-loosening function. Follow applicable mechanical codes and equipment manufacturer torque specifications for the fastener grade and size.