Value Collection C39067 Flange Bolt 5/8-18 Unf 3 in Grade 8

Product Description

The VALUE COLLECTION C39067 is a smooth flange bolt designed for heavy-duty mechanical fastening applications. It features a 5/8-18 UNF thread form with a 3-inch length under the head and 1.5 inches of partial thread engagement. The integrated smooth flange distributes clamping load across a wider bearing surface, reducing the need for a separate washer. Manufactured from Grade 8 alloy steel in an uncoated finish, this bolt meets IFI 111 and SAE J429 standards for strength and dimensional accuracy. It is driven with a standard hex head and is suited for applications where high tensile strength and precise thread fit are required.

This bolt is appropriate for industrial, mechanical, and equipment assembly applications where UNF fine-thread fasteners are specified. The partial threading allows for a smooth shank section, which is useful in shear or pivot locations. The smooth flange eliminates marring of mating surfaces and provides a flush, stable seating area. Typical installers include millwrights, maintenance mechanics, and equipment technicians working on machinery, vehicle components, structural assemblies, and general industrial fabrication requiring Grade 8 rated fasteners.

Key Features

• 5/8-18 UNF fine thread for precise torque and thread engagement
• 3-inch length under head with 1.5 inches of partial threading
• Integrated smooth flange measuring 1.3281 inches (1-21/64 inches) in diameter for washer-free load distribution
• Grade 8 alloy steel construction for high tensile strength
• Uncoated finish suitable for use as-is or with applied coatings post-installation
• Meets IFI 111 and SAE J429 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-service fastener for any application specifying a 5/8-18 UNF partially threaded smooth flange hex bolt to IFI 111 and SAE J429 requirements.

Installation Notes

Installation should be performed by qualified mechanics or technicians familiar with torque specifications for Grade 8 UNF fasteners. Verify thread engagement depth and flange seating before applying final torque. Use calibrated torque tools and consult the equipment manufacturer's fastener torque tables for the specific application. Inspect threads for damage or contamination before installation to ensure full rated clamp load is achieved.