Value Collection C703218 Hex Head Cap Screw 1/2-13 Grade 8

Product Description

The VALUE COLLECTION C703218 is a Grade 8 steel hex head cap screw sized at 1/2-13 UNC thread with a 2.75-inch length under head. Partially threaded and supplied uncoated, this fastener meets ASME B18.2.1 dimensional standards for inch-series hex cap screws. Grade 8 alloy steel delivers high tensile strength, making it appropriate for structural, mechanical, and heavy-duty equipment assemblies. Machinists, millwrights, pipefitters, and general maintenance tradespeople use this screw wherever a reliable, high-strength hex drive fastener is specified. The 1/2-13 UNC thread designation indicates a coarse thread series, which is standard in most domestic heavy equipment and industrial framing applications.

This screw is suited for use in industrial machinery, structural steel connections, HVAC equipment mounting, and heavy mechanical assemblies where Grade 8 strength is specified. The partially threaded shank provides a grip length that transfers shear load through the unthreaded section, which is a common engineering requirement in bolted joints. Sold in a package quantity of 25, it is practical for both single-job use and small-quantity stocking. Applications span commercial construction, equipment fabrication, and maintenance repair operations across multiple trades.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-13 UNC coarse thread for broad compatibility with standard inch-series nuts and tapped holes
• 2.75-inch length under head with partial threading to provide a load-bearing grip section
• Uncoated finish — suitable for applications where a specific plating or coating will be applied or is not required
• Meets ASME B18.2.1 dimensional standard for hex cap screws
• Sold in a 25-piece package to cover single jobs or low-quantity stocking needs

Compatibility

Designed as a standard inch-series hex head cap screw for use with any 1/2-13 UNC nut, threaded insert, or tapped hole conforming to ASME or UNC thread standards.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance tradespeople using a 3/4-inch hex wrench or socket. Verify mating thread condition and hole alignment before final tightening. Follow applicable torque specifications for Grade 8 fasteners as defined by the governing engineering or equipment standard for the assembly. Do not mix inch-series and metric hardware in the same bolted joint.