Value Collection HCI20310250G-100BX Hex Bolt 5/16-18 2-1/2in Grade 2

Product Description

The VALUE COLLECTION HCI20310250G-100BX is a 5/16-18 UNC hex head bolt manufactured from Grade 2 steel with a hot-dipped galvanized finish. The bolt measures 2.5 inches in length under the head and features partial threading along the shank. It meets ASTM A307 fastener standards, making it suitable for general-purpose structural and mechanical fastening applications. This box of 100 bolts is sized for trade and contractor use where consistent corrosion-resistant hardware is needed in volume. Plumbers, electricians, HVAC techs, and general contractors commonly specify this bolt for bracket mounting, equipment attachment, and light structural connections.

This bolt is well suited for residential and light commercial installations where a standard inch-series fastener with corrosion resistance is required. The hot-dipped galvanized coating provides added protection in moist or outdoor-adjacent environments, such as mechanical rooms, rooftop equipment mounts, and utility spaces. The partial thread configuration allows for greater shank grip strength in through-bolt applications. Sold in a box of 100, this SKU is practical for job-site stocking and multi-unit installations.

Key Features

• 5/16-18 UNC thread size for compatibility with standard inch-series nuts and tapped holes
• 2.5 inch length under head for adequate shank depth in typical fastening applications
• Hot-dipped galvanized finish for corrosion resistance in damp or outdoor-adjacent environments
• Partial threading provides stronger shank section and better grip in clearance-hole applications
• Meets ASTM A307 standard for general-purpose low-carbon steel fasteners
• Box of 100 for job-site stocking efficiency

Compatibility

Designed as a general-purpose inch-series hex head bolt compatible with standard 5/16-18 UNC nuts, washers, and tapped holes in steel, wood, and similar substrates where Grade 2 fastener strength is appropriate.

Installation Notes

Installation is performed by qualified tradespeople using a standard hex wrench, socket driver, or impact driver sized for the bolt head. Always ensure the mating nut or tapped hole matches the 5/16-18 UNC thread specification before installation. De-energize and lock out any electrical or mechanical equipment before fastening hardware in proximity to live components. Follow applicable building and mechanical codes for fastener grade and torque requirements for the specific application.