Value Collection 825156MSC Serrated Flange Bolt 1/2-13 Unc

Product Description

The VALUE COLLECTION 825156MSC is a serrated flange bolt designed for general mechanical and structural fastening applications. It features a 1/2-13 UNC thread in a fully threaded configuration with a 1-1/2 inch length under head. The integrated serrated flange measures 1.07 inches in diameter and acts as a built-in washer face with teeth that resist loosening under vibration. Manufactured from Grade 5 steel with a zinc-plated finish for corrosion resistance, this bolt conforms to ASME B18.6.3 and SAE J429 standards. It is driven by a standard hex drive. Trade professionals in mechanical, HVAC equipment mounting, and general structural assembly work will find this a reliable fastener for vibration-prone joints.

This serrated flange bolt is suited for use in residential and light commercial applications where vibration resistance is required without a separate lock washer. Common install scenarios include equipment base mounting, sheet metal assemblies, HVAC unit frames, and general machinery. The serrated flange distributes clamping load across a wider surface area while the teeth bite into the mating surface to prevent back-off. Sold in multiples of 25 units per order.

Key Features

• 1/2-13 UNC thread size, fully threaded along the entire 1-1/2 inch length under head
• Integrated 1.07 inch diameter serrated flange eliminates the need for a separate lock washer
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides baseline corrosion protection
• Hex drive compatible with standard sockets and wrenches
• Conforms to ASME B18.6.3 and SAE J429 fastener standards

Compatibility

Designed as a standard inch-series serrated flange bolt for use in any application requiring a 1/2-13 UNC threaded fastener with an integrated flange bearing surface. Consult equipment documentation to confirm thread engagement depth and clamping requirements before installation.

Installation Notes

Installation should be performed by a qualified mechanic or technician using a properly sized hex socket or wrench. Power down or de-energize any equipment before accessing mounting hardware. Do not mix inch-series and metric fasteners, and confirm thread engagement of at least one bolt diameter into the mating material. The serrated flange requires a clean, flat mating surface for the teeth to engage properly — painted or coated surfaces may reduce locking effectiveness.