Value Collection 3GBM905C0400 Hex Bolt 5/16-18 4in Grade 2

Product Description

The VALUE COLLECTION 3GBM905C0400 is a Grade 2 steel hex head bolt with a 5/16-18 UNC thread and a 4-inch length under head. It features a hot-dipped galvanized finish for corrosion resistance in exterior and moisture-exposed applications. The bolt is partially threaded, which is standard for bolts of this length and thread size, allowing the unthreaded shank to bear shear loads. The 1/2-inch hex drive is compatible with standard wrenches and sockets. This fastener meets ANSI/ASME B18.2.1 dimensional standards and is sized for general mechanical assembly work across HVAC, plumbing, electrical, and structural support applications.

This bolt is suited for general fastening tasks in both light commercial and residential trade work. Common applications include equipment mounting, structural bracketing, pipe support assemblies, and panel anchoring where a corrosion-resistant fastener is required. The hot-dipped galvanized coating makes it appropriate for outdoor installations or damp environments such as mechanical rooms, rooftop equipment pads, and utility areas. Installers working with galvanized structural components will find this bolt a direct fit for typical field assembly requirements.

Key Features

• 5/16-18 UNC thread with 4-inch length under head for standard through-bolt applications
• Hot-dipped galvanized finish provides corrosion resistance in wet and outdoor environments
• Grade 2 steel construction meets general-purpose fastener strength requirements
• Partially threaded shank allows shear load transfer across joint interfaces
• 1/2-inch hex drive fits standard wrenches and impact sockets
• Conforms to ANSI/ASME B18.2.1 dimensional standards for reliable fitment

Compatibility

Designed as a general-purpose UNC hex head bolt for use in standard 5/16-inch clearance hole assemblies requiring a Grade 2 galvanized fastener.

Installation Notes

Installation is performed by mechanical, HVAC, plumbing, or electrical tradespeople during equipment mounting or structural assembly. Power down and de-energize any equipment before fastening near electrical panels or live components. Use appropriate wrenches or impact tools rated for the drive size; do not substitute undersized drive tools that may round the hex. Follow applicable codes such as the IPC, IFGC, or NEC for fastener requirements specific to the trade application.