Value Collection 824137MSC Serrated Flange Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION 824137MSC is a fully threaded serrated flange bolt designed for general-purpose fastening in mechanical, structural, and light industrial assemblies. It features a 5/16-18 UNC thread with a 1-3/4 inch length under head and a 0.68 inch serrated flange diameter. The integrated serrated flange distributes clamping load and bites into the mating surface to resist loosening under vibration, eliminating the need for a separate lock washer. Made from Grade 5 steel with a zinc-plated finish, this bolt meets ASME B18.6.3 and SAE J429 standards. It is installed with a hex drive.

This bolt is suited for residential and commercial mechanical assemblies where vibration resistance is required without adding a separate locking fastener. Common applications include HVAC equipment mounting, electrical enclosure assembly, sheet metal fabrication, and general structural fastening where the serrated flange provides positive retention against loosening. The zinc-plated finish provides basic corrosion resistance for indoor or sheltered installations.

Key Features

• 5/16-18 UNC fully threaded shank, 1-3/4 inches length under head
• Integrated 0.68 inch serrated flange eliminates need for separate lock washer
• Grade 5 steel construction meets SAE J429 mechanical requirements
• Zinc-plated finish for basic corrosion protection
• Hex drive for standard socket or wrench installation
• Conforms to ASME B18.6.3 dimensional standard

Compatibility

Designed as a standard 5/16-18 UNC serrated flange bolt suitable for use wherever a Grade 5 hex flange bolt with integrated serration is specified in ASME B18.6.3 applications.

Installation Notes

Install using a standard hex socket or wrench sized for the flange bolt head. Ensure mating surfaces are clean and free of debris so the serrations can seat properly and provide locking action. Do not use an additional lock washer under the flange, as this defeats the serration contact. Follow applicable mechanical codes and equipment manufacturer torque specifications for 5/16-18 Grade 5 fasteners.