Value Collection 406338PS Serrated Flange Bolt 1/2-13 Unc

Product Description

The VALUE COLLECTION 406338PS is a serrated flange bolt designed for secure fastening in structural and mechanical assemblies. It features a 1/2-13 UNC thread with a 3-inch length under the head and is fully threaded from the flange to the tip. The integrated serrated flange distributes load across a wider bearing surface and bites into the mating material to resist loosening under vibration. Made from AISI C1022 Grade 2 steel with a zinc-plated finish, this bolt suits general-purpose fastening applications where corrosion resistance and reliable clamp load are required. Installation is performed with a standard hex wrench or socket.

This bolt is suited for residential and light commercial construction, mechanical equipment mounting, and general fabrication work. The serrated flange eliminates the need for a separate lock washer in most applications, reducing hardware count and assembly time. Typical uses include structural panel attachment, equipment frames, and similar assemblies where vibration-induced loosening is a concern. This fastener uses inch-based dimensions and UNC thread form, making it compatible with standard imperial tooling and hardware.

Key Features

• 1/2-13 UNC fully threaded shaft, 3 inches length under head
• Serrated flange bearing surface resists loosening under vibration without a separate lock washer
• Flange diameter of 1.02 to 1.07 inches for broad load distribution
• AISI C1022 Grade 2 steel construction for general-purpose strength
• Zinc-plated finish for basic corrosion resistance
• Hex drive for use with standard sockets and wrenches

Compatibility

Designed as a general-purpose imperial fastener compatible with any assembly using 1/2-13 UNC threaded holes requiring a serrated flange bolt with a 3-inch length under head.

Installation Notes

Installation is typically performed by a qualified mechanic, millwright, or trade professional using a standard hex socket or open-end wrench sized for a 1/2-inch bolt head. De-energize and lock out any equipment before fastener service. The serrated flange requires a clean, flat mating surface to seat properly and achieve full anti-loosening effect. Do not use an additional lock washer between the flange and the mating surface, as this negates the serration contact.