Value Collection HCI20310075-100BX Hex Head Bolt 5/16-18

Product Description

The VALUE COLLECTION HCI20310075-100BX is a Grade 2 steel hex head bolt with a 5/16-18 UNC thread and 3/4 inch length under head. It is fully threaded from tip to head, meeting ASTM A307 standards for general-purpose fastener applications. The uncoated bright finish leaves the steel in its natural state, suitable for interior or protected installations. This bolt is a staple fastener for maintenance technicians, millwrights, HVAC installers, and general tradespeople who need a reliable, code-recognized fastener for light to moderate structural and mechanical connections.

This bolt is used across a wide range of trade applications including equipment mounting, bracket attachment, ductwork support framing, electrical enclosure assembly, and general mechanical assembly. The 5/16-18 thread size is one of the most common UNC fastener sizes found in residential and light commercial construction and equipment installation. It is sold in a minimum order quantity of 100 pieces per box, making it practical for job-site stocking and bulk service work.

Key Features

• 5/16-18 UNC thread — one of the most widely used inch-series thread sizes in trade work
• 3/4 inch length under head — fully threaded for maximum thread engagement in thin material applications
• Grade 2 steel construction meets ASTM A307 standard for general fastener service
• Bright uncoated finish — no coating to interfere with thread fit or torque values
• Sold in a box of 100 for efficient job-site and shop inventory management

Compatibility

Designed as a general-purpose inch-series hex head fastener compatible with any 5/16-18 UNC threaded hole or nut in standard mechanical and structural assembly applications.

Installation Notes

Installation is performed with a standard 1/2 inch hex wrench or socket driver. Ensure mating threads are clean and free of debris before installation. Grade 2 fasteners are not rated for high-stress or shear-critical structural connections — verify bolt grade requirements against the applicable building or mechanical code before use. Do not use in applications requiring Grade 5 or Grade 8 fasteners unless confirmed compatible by an engineer.