Value Collection C39064-1 Smooth Flange Bolt 5/8-18 Unf

Product Description

The VALUE COLLECTION C39064-1 is a smooth flange bolt designed for applications requiring a load-distributing flange head with no serrations. Sized at 5/8-18 UNF with a 1-3/4 inch length under head, this partially threaded fastener is manufactured from Grade 8 alloy steel, providing high tensile strength suitable for demanding structural and mechanical assemblies. The smooth flange measures 1-21/64 inches (1.3281 inches) in diameter, spreading clamp load across a wider bearing surface without the need for a separate washer. The bolt is supplied uncoated and conforms to IFI 111 and SAE J429 standards. Maintenance technicians, millwrights, and mechanical contractors typically source this fastener for heavy-duty equipment assembly and repair work.

This smooth flange bolt is suited for residential and commercial mechanical assemblies where a unified fine thread (UNF) pattern is specified and a wide bearing surface is needed. Typical applications include equipment frames, brackets, and structural connections where Grade 8 strength is required. The partially threaded shank provides an unthreaded grip section, making it appropriate for connections that require precise shank engagement or where the shank passes through a clearance hole before reaching the threaded portion of the joint.

Key Features

• 5/8-18 UNF thread size with 1-3/4 inch length under head, partially threaded for shank grip control
• Grade 8 alloy steel construction for high tensile and proof load strength
• Smooth flange head distributes clamp load without serrations, eliminating the need for a separate flat washer
• Flange diameter of 1-21/64 inches (1.3281 inches) provides broad bearing surface
• Hex drive for standard socket or wrench installation
• Conforms to IFI 111 and SAE J429 fastener standards

Compatibility

Designed as an OEM-style replacement or service fastener for mechanical assemblies specifying a 5/8-18 UNF smooth flange bolt with Grade 8 alloy steel and IFI 111 or SAE J429 compliance.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians following the equipment manufacturer's torque specifications for 5/8-18 Grade 8 fasteners. De-energize and lock out all equipment before accessing fastener locations in powered assemblies. Use a properly sized hex socket or wrench to avoid rounding the flange head. Do not substitute this uncoated fastener in environments requiring corrosion-resistant finishes without evaluating the application requirements.