Value Collection D39227 Hex Head Cap Screw 1-8x7 Grade 8

Product Description

The VALUE COLLECTION D39227 is a partially threaded hex head cap screw designed for heavy-duty fastening applications in industrial, mechanical, and structural assemblies. Manufactured to ASME B18.2.1 standards, it measures 1-8 UNC thread size with a 7-inch length under head and is produced from Grade 8 steel with a zinc yellow dichromate finish. The zinc yellow dichromate coating provides corrosion resistance and a visual indicator of the Grade 8 hardness classification. This fastener is suited for high-strength bolted joints where standard-grade hardware is insufficient. Machinists, millwrights, and maintenance technicians working on equipment assemblies, structural connections, or machinery installations are the typical end users.

This cap screw is used in applications requiring a high-tensile, partially threaded fastener with a standard hex drive head. Partial threading allows the unthreaded shank to bear shear loads in bolted joint assemblies, making it appropriate for machinery frames, heavy equipment, jigs, fixtures, and structural steel connections. It is compatible with standard UNC 1-8 hex nuts and tapped holes machined to ASME B18.2.1 tolerances. Minimum order quantity is 5 pieces.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance and Grade 8 identification
• Partially threaded shank supports shear load transfer in bolted joints
• UNC thread form for broad compatibility with standard nuts and tapped components
• Conforms to ASME B18.2.1 dimensional standards

Compatibility

Designed for use with standard UNC 1-8 hex nuts and tapped holes conforming to ASME B18.2.1 specifications in high-strength bolted assemblies.

Installation Notes

Installation is performed by qualified mechanical tradespeople using calibrated torque tools appropriate for Grade 8 fasteners. Always verify mating thread condition and ensure the tapped hole or nut meets UNC 1-8 specifications before assembly. Do not mix Grade 8 fasteners with lower-grade nuts in high-load joints. Follow applicable industry torque specifications for the joint design and material being fastened.