Value Collection C50000421 Smooth Flange Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION C50000421 is a smooth flange bolt designed for secure fastening in structural and mechanical assemblies. It features a 5/16-18 UNC thread and a fully threaded shank measuring 1 inch in length under the head. The 11/16 inch (0.6875 inch) smooth flange distributes clamping load across a wider bearing surface, reducing the need for a separate washer. Manufactured from Grade 8 alloy steel and finished with a zinc-plated coating for corrosion resistance, this bolt meets SAE J429 standards. It is driven by a standard hex drive. This package contains 50 bolts.

This bolt is suited for high-strength fastening applications in HVAC equipment mounting, electrical enclosure assembly, plumbing fixture installation, and general mechanical fabrication. The smooth flange profile is appropriate where a clean bearing surface is required without a serrated grip. Grade 8 alloy steel construction makes it appropriate for applications that demand higher tensile and proof load ratings than standard Grade 2 or Grade 5 hardware. Licensed tradespeople and fabricators working on metal-to-metal connections will find this fastener compatible with standard inch-series assembly workflows.

Key Features

• 5/16-18 UNC fully threaded shank for consistent thread engagement along the full 1 inch length under head
• 11/16 inch smooth flange distributes clamping load and eliminates the need for a separate flat washer in most applications
• Grade 8 alloy steel construction provides high tensile strength suitable for structural and mechanical fastening
• Zinc-plated finish offers baseline corrosion protection in dry and mildly humid environments
• Meets SAE J429 fastener standard for dimensional and mechanical property compliance
• Hex drive compatible with standard wrenches and sockets

Compatibility

Designed as an OEM-style replacement or standard-stock flange bolt for any application requiring a 5/16-18 UNC, 1 inch length under head, fully threaded, smooth flange fastener conforming to SAE J429.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for a 5/16 inch bolt head. Power down or de-energize any equipment before inserting fasteners into electrical enclosures or energized assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards such as the NEC or IFGC for your specific application. Do not use this bolt as a substitute for a serrated flange bolt in applications requiring vibration-locking without a separate locking element.