Value Collection 821276MSC Flange Bolt 5/8-11 Unc 3-1/2 in Grade 8

Product Description

The VALUE COLLECTION 821276MSC is a smooth flange bolt designed for structural and mechanical fastening applications where a built-in bearing surface is required. Sized at 5/8-11 UNC with a 3-1/2 inch length under head, this bolt is partially threaded with 1-1/2 inches of thread engagement. The integrated smooth flange measures 1-21/64 inches (1.3281 inches) in diameter and distributes clamping load without a separate washer. Manufactured from Grade 8 alloy steel with a phosphate and oil finish, it delivers high tensile strength and corrosion resistance suitable for heavy-duty fastening. This fastener meets IFI 111 and SAE J429 standards and is installed with a standard hex drive.

This bolt is used in industrial, mechanical, and structural assemblies where a flanged fastener eliminates the need for a loose washer and provides a clean, load-distributing interface. Common applications include equipment frames, brackets, machinery mounts, and fabricated steel assemblies. The Grade 8 rating makes it appropriate for high-stress connections in both OEM manufacturing and field repair work. Machinists, millwrights, and maintenance technicians are the typical installers in these settings.

Key Features

• 5/8-11 UNC thread size with 1-1/2 inches of partial threading for controlled engagement depth
• Integrated smooth flange at 1-21/64 inches diameter distributes clamping load without a separate washer
• Grade 8 alloy steel construction provides high tensile and proof load ratings
• Phosphate and oil finish offers baseline corrosion protection and lubricity during installation
• Hex drive head for use with standard wrenches and sockets
• Meets IFI 111 and SAE J429 fastener standards

Compatibility

Designed as an OEM-style and replacement fastener for any application requiring a 5/8-11 UNC partially threaded smooth flange bolt with a 3-1/2 inch length under head and Grade 8 strength rating.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with inch-series fastener torque requirements for Grade 8 hardware. Always clean and inspect mating threads before installation. Use a calibrated torque wrench and follow the torque specifications published in the applicable equipment service manual or fastener standards reference. Do not reuse fasteners that show signs of thread damage, corrosion, or deformation.