Hillman Fasteners 190108 Hex Bolt 5/16-18 X 2-1/2 in 100 Pack

Product Description

The HILLMAN FASTENERS 190108 is a 5/16-18 x 2-1/2 inch hex bolt manufactured from low carbon steel with a coarse thread pattern. These bolts are sold in a 100-piece pack, making them a practical choice for contractors, maintenance crews, and tradespeople who need reliable fasteners in quantity. The 5/16-18 designation indicates a 5/16-inch nominal diameter with 18 threads per inch, conforming to standard Unified Coarse (UNC) thread specifications. Low carbon steel construction provides adequate tensile strength for general-purpose structural and mechanical assembly applications.

This hex bolt is suited for residential and light commercial construction, mechanical assembly, equipment mounting, and general maintenance work. The coarse thread form is preferred in applications where fast assembly is needed, where threads may be subject to contamination or minor damage, or where the mating material is softer metal, wood, or plastic. These bolts are a staple fastener for framing, fixture installation, and equipment fabrication across plumbing, HVAC, and general mechanical trades.

Key Features

• 5/16-18 UNC coarse thread for fast, reliable engagement
• 2-1/2 inch grip length suitable for moderate-depth fastening applications
• Low carbon steel construction for general-purpose load-bearing use
• Standard hex head drives with common wrenches and sockets
• 100-piece pack quantity reduces reorder frequency on active job sites

Compatibility

Designed as a standard UNC hex bolt compatible with any 5/16-18 threaded nut, insert, or tapped hole conforming to ASME B18.2.1 dimensional standards for inch-series hex bolts.

Installation Notes

Installation does not require specialized tools beyond a standard 1/2-inch wrench or socket. Confirm mating nut or tapped hole matches the 5/16-18 UNC thread specification before driving. Do not exceed the rated torque range for the bolt grade and material combination in use. In structural or code-governed applications, verify fastener grade requirements with the applicable building or mechanical code before installation.