Value Collection D39205 Hex Head Cap Screw 7/8-9 X 6 in Grade 8

Product Description

The VALUE COLLECTION D39205 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 7/8-9 UNC thread size and a 6-inch length under head, making it suitable for heavy-duty bolted connections where a full thread length is not required. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, it delivers elevated tensile strength and corrosion resistance. This fastener conforms to ASME B18.2.1 and SAE J429 standards, ensuring dimensional and mechanical consistency for demanding applications.

This cap screw is commonly used by millwrights, maintenance technicians, and industrial mechanics in manufacturing plants, construction equipment, and heavy machinery. The partial thread design is well suited for applications where the shank must pass through a clearance hole before engaging the threaded section, providing a reliable clamping load. It is a standard inch-measurement fastener appropriate for general industrial maintenance, OEM assembly, and field repair work requiring Grade 8 strength ratings.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength for demanding fastening applications
• Zinc yellow dichromate finish offers corrosion resistance and visual identification as a Grade 8 fastener
• Partially threaded shank allows full-shank engagement through clearance holes before thread engagement
• 7/8-9 UNC thread form follows Unified National Coarse standard for broad tooling and nut compatibility
• Conforms to ASME B18.2.1 and SAE J429 for dimensional accuracy and mechanical property compliance
• 6-inch length under head accommodates thick material stacks or long-reach bolting configurations

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts and threaded components conforming to ASME and SAE inch-series fastener standards in industrial and mechanical assemblies.

Installation Notes

Installation should be performed by qualified mechanics or maintenance personnel using calibrated torque wrenches appropriate for Grade 8 fasteners. Verify that mating nuts and threaded holes conform to the 7/8-9 UNC thread standard before assembly. Do not mix Grade 8 fasteners with lower-grade nuts, as mismatched hardware can compromise joint integrity. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards when tightening.