Value Collection HCI20621000G6 Hex Head Bolt 5/8-11

Product Description

The VALUE COLLECTION HCI20621000G6 is a 5/8-11 hex head bolt designed for general-purpose structural and mechanical fastening applications. This bolt measures 10 inches in length under the head and features a hot-dipped galvanized finish for corrosion resistance in outdoor and high-moisture environments. Manufactured from Grade 2 steel and produced to ASTM A307 standards, it uses a partially threaded shank, which is standard for through-bolting applications where bearing load distribution matters. Tradespeople across construction, mechanical contracting, and general fabrication rely on this bolt type for routine structural connections.

This bolt is suited for residential and light commercial construction, equipment mounting, structural framing connections, and general fabrication work where ASTM A307 Grade 2 fasteners are specified. The 5/8-11 UNC thread size is a common specification in structural bolt patterns, and the 10-inch length accommodates thicker material stacks or long through-bolt assemblies. The hot-dipped galvanized finish makes it appropriate for exterior and treated-lumber applications where bare steel would corrode prematurely.

Key Features

• 5/8-11 UNC thread size with partial threading along the shank
• 10-inch length under head for deep through-bolt assemblies
• Hot-dipped galvanized finish provides corrosion resistance in outdoor and wet environments
• Grade 2 steel meets ASTM A307 fastener standard
• Inch measurement system with standard hex head drive

Compatibility

Designed as an OEM-style replacement or standard-supply fastener for applications specifying 5/8-11 UNC hex head bolts to ASTM A307 Grade 2 requirements.

Installation Notes

Installation is typically performed by structural trades, mechanical contractors, or general construction crews using a standard hex wrench, socket set, or impact driver with the appropriate 5/8-inch drive. Always confirm the mating nut and washer specification matches the Grade 2 ASTM A307 designation before installation. When used with pressure-treated lumber, verify that the hot-dipped galvanized coating meets applicable building code requirements for contact with treated wood. Do not use an impact wrench to overtighten Grade 2 hardware, as this grade has lower proof load limits than Grade 5 or Grade 8 fasteners.