Value Collection D39139 Hex Cap Screw 9/16-12 X 3-1/2 in Grade 8

Product Description

The VALUE COLLECTION D39139 is a partially threaded hex head cap screw designed for high-strength fastening applications. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, it delivers strong corrosion resistance and meets the mechanical property requirements demanded in heavy-duty assemblies. The screw features a 9/16-12 UNC thread size and a 3-1/2 inch length under head. It conforms to ASME B18.2.1 and SAE J429 standards, making it a recognized choice for structural, industrial, and mechanical installations where fastener grade traceability matters.

This hex head cap screw is suited for applications in industrial machinery, structural fabrication, heavy equipment assembly, and general mechanical maintenance. The partial threading allows the shank to bear shear loads, which is useful in bolted joint designs requiring a grip length. Maintenance technicians, millwrights, and industrial mechanics routinely specify Grade 8 hardware in applications involving vibration, high clamping force, or load-bearing connections. This fastener ships in a minimum order quantity of 10 pieces.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance and visual grade identification
• Partially threaded shank supports shear load bearing in bolted joints
• 9/16-12 UNC thread for compatibility with standard inch-series nuts and tapped holes
• Meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards
• Minimum order quantity of 10 pieces per order

Compatibility

Designed for use with standard 9/16-12 UNC inch-series hex nuts, flat washers, and tapped holes conforming to UNC thread standards in industrial and structural fastening applications.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with fastener torque specifications for Grade 8 hardware. Always use a calibrated torque wrench and apply the appropriate torque value per the joint design specification or applicable engineering standard. Ensure mating threads and bearing surfaces are clean and free of damage before assembly. De-energize and lock out any equipment before servicing fastened assemblies per applicable safety procedures.