Value Collection D39109 Hex Cap Screw 1/2-13 X 2-1/4 in Grade 8

Product Description

The VALUE COLLECTION D39109 is a Grade 8 steel hex head cap screw with a 1/2-13 UNC thread and a 2-1/4 inch length under head. This partially threaded fastener carries a zinc yellow dichromate finish, which provides corrosion resistance and a distinctive yellow appearance for easy identification. It meets ASME B18.2.1 dimensional standards, making it a reliable choice for structural and high-strength bolted assemblies. Machinists, millwrights, and maintenance technicians reach for Grade 8 hex cap screws when joint integrity and high tensile strength are the primary requirements.

This fastener is suited for industrial maintenance, equipment assembly, and structural fabrication applications where high-strength inch-series fasteners are specified. The 1/2-13 UNC thread is one of the most common coarse-thread sizes in inch-series hardware, found in machine frames, brackets, flanges, and general mechanical assemblies across manufacturing, construction, and heavy equipment service environments.

Key Features

• Grade 8 steel construction provides high tensile strength for demanding bolted joints
• 1/2-13 UNC coarse thread for broad compatibility with standard inch-series nuts and tapped holes
• Partially threaded shank allows for shear-bearing load applications
• Zinc yellow dichromate finish offers corrosion resistance and grade identification
• Conforms to ASME B18.2.1 dimensional standards
• 2-1/4 inch length measured under head per standard length measurement convention

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1/2-13 UNC nuts, washers, and tapped holes in structural, industrial, and mechanical assembly applications requiring Grade 8 fastener strength.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or technician familiar with high-strength fastener practices. Always use the correct grade of nut and hardened washer to match the Grade 8 fastener. Verify that mating threads are clean and undamaged before installation. Do not mix inch and metric hardware or substitute lower-grade fasteners in Grade 8 applications.