Value Collection D39009 Hex Head Cap Screw 1/4-20

Product Description

The VALUE COLLECTION D39009 is a Grade 8 steel hex head cap screw with a 1/4-20 UNC thread and a 2-1/4-inch length under head. It carries a zinc yellow dichromate finish, which provides corrosion resistance and serves as a visual indicator of its Grade 8 hardness classification. The screw is partially threaded and conforms to ASME B18.2.1 dimensional standards. It is used by maintenance technicians, mechanical contractors, and industrial assemblers wherever a high-strength inch-series fastener is required.

This fastener is suited for general mechanical assembly, equipment maintenance, and structural fastening applications where Grade 8 strength is specified. The 1/4-20 UNC thread is one of the most common inch-series thread forms in industrial and commercial equipment. The zinc yellow dichromate finish makes it appropriate for indoor and light-duty outdoor assemblies where moderate corrosion resistance is needed.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance and identifies Grade 8 classification
• Partially threaded shank suits applications requiring a grip length below the head
• Conforms to ASME B18.2.1 for consistent dimensional tolerances
• 1/4-20 UNC thread for broad tooling and nut compatibility

Compatibility

Designed as a standard inch-series hex head cap screw compatible with any 1/4-20 UNC threaded hole or matching nut meeting ASME B18.2.1 dimensional requirements.

Installation Notes

Installation is typically performed by maintenance mechanics or assembly technicians using a standard hex wrench or socket driver. Verify thread engagement depth and mating material before torquing. Do not mix inch-series and metric hardware. Follow applicable equipment manufacturer torque specifications for Grade 8 fasteners of this diameter.