Value Collection D39108 Hex Head Cap Screw 1/2-13 X 2 in

Product Description

The VALUE COLLECTION D39108 is a Grade 8 steel hex head cap screw with a 1/2-13 UNC thread and a 2-inch length under the head. It features a zinc yellow dichromate finish that provides corrosion resistance in general industrial and mechanical applications. The fastener is partially threaded and conforms to ASME B18.2.1 dimensional standards. It is installed by mechanics, millwrights, maintenance technicians, and tradespeople who require a high-strength fastener for structural or load-bearing assemblies. Grade 8 designation indicates a tensile strength suitable for demanding bolted joints where standard hardware-grade fasteners are not adequate.

This hex head cap screw is suited for use in industrial machinery, heavy equipment, structural steel connections, and general mechanical assemblies requiring inch-series fasteners. The 1/2-13 UNC thread is one of the most common coarse-thread sizes in inch-system applications, making this screw a standard fit in a wide range of fabrication and maintenance scenarios. The partial threading leaves a smooth shank near the head, which is preferred in applications where shear load transfer through the grip length is required.

Key Features

• Grade 8 steel construction for high tensile strength in demanding bolted connections
• 1/2-13 UNC coarse thread — standard inch-series sizing widely used in mechanical and structural assemblies
• Partially threaded shank provides a smooth grip length for shear load applications
• Zinc yellow dichromate finish offers corrosion resistance over bare steel
• Conforms to ASME B18.2.1 for consistent dimensional accuracy
• 2-inch length under the head suits medium-depth through-bolt and tapped-hole installations

Compatibility

Designed for use with standard 1/2-13 UNC nuts and tapped holes in inch-series mechanical and structural assemblies conforming to ASME B18.2.1 specifications.

Installation Notes

Installation is performed by mechanics, millwrights, or maintenance technicians using a standard hex wrench or socket driver sized for a 1/2-inch Grade 8 cap screw. Fastener torque should be determined by the engineer of record or equipment manufacturer based on joint requirements and lubrication conditions. Always inspect threads and mating surfaces for damage before installation. Follow applicable industry standards and equipment service procedures when replacing structural fasteners.