Value Collection 824028MSC Serrated Flange Bolt 1/4-20 Unc

Product Description

The VALUE COLLECTION 824028MSC is a serrated flange bolt designed for secure fastening in applications where a locking grip and integrated bearing surface are required. This fully threaded hex-drive fastener features a 1/4-20 UNC thread with 1 inch of thread length under the head and a 0.56-inch serrated flange diameter. Manufactured from Grade 5 steel with a zinc-plated finish for corrosion resistance, it meets ASME B18.6.3 and SAE J429 standards. Machinists, maintenance technicians, and assembly professionals install this type of fastener where vibration resistance and a wider load-bearing surface are priorities.

This serrated flange bolt is suited for light-to-medium duty assembly and maintenance applications across industrial, HVAC, electrical, and mechanical trades. The serrated flange face bites into the mating surface during installation, providing resistance to loosening under vibration without requiring a separate lock washer. Its fully threaded body allows for maximum engagement in shallow or through-hole applications. Typical use cases include equipment panels, brackets, and structural mounting where a 1/4-20 UNC thread pattern is specified.

Key Features

• 1/4-20 UNC fully threaded body — 1 inch length under head for versatile shallow and through-hole fitment
• Serrated flange face eliminates the need for a separate lock washer by biting into the mating surface
• 0.56-inch flange diameter distributes clamping load over a wider bearing surface
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides baseline corrosion resistance in indoor and light-exposure environments
• Compliant with ASME B18.6.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or general-use fastener for any application specifying a 1/4-20 UNC serrated flange bolt with 1 inch length under head and Grade 5 steel construction.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for a 1/4-inch hex flange bolt head. Ensure the mating surface is clean and free of debris so the serrated flange can seat properly and provide full locking engagement. Do not over-torque, as Grade 5 fasteners have defined proof load limits — consult applicable engineering or maintenance documentation for torque specifications. Always follow applicable codes and safety procedures when working on live mechanical or electrical assemblies.