Value Collection D39224 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION D39224 is a partially threaded hex head cap screw designed for high-strength fastening in demanding industrial and mechanical applications. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade hardware. The 1-8 UNC thread pitch and 5-1/2 inch length under head make it suitable for heavy structural assemblies where clamping force and fatigue resistance are critical. It conforms to ASME B18.2.1 dimensional standards, ensuring consistent fit across standard hex tooling and installation equipment used by mechanical contractors and maintenance professionals.

This cap screw is commonly used in structural steel connections, heavy equipment assembly, and industrial maintenance applications where Grade 8 strength is specified. The partial threading provides a smooth shank section that resists shear loads and allows precise positioning in clearance holes before thread engagement. It is appropriate for use in both new construction and retrofit mechanical assemblies requiring UNC fasteners in this size range.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Partially threaded shank resists shear forces and aids alignment
• 1-8 UNC thread standard for broad tooling and nut compatibility
• Conforms to ASME B18.2.1 dimensional standards
• 5-1/2 inch length under head suits thick structural assemblies

Compatibility

Designed as a standard UNC hex head cap screw for use with 1-8 Grade 8 nuts, washers, and tapped holes conforming to ASME B18.2.1 specifications in industrial and structural mechanical assemblies.

Installation Notes

Installation is performed by mechanical contractors and maintenance technicians using standard hex wrenches or impact tooling sized for the 1-8 fastener. Always verify hole clearance and thread engagement depth before torquing. Follow applicable torque specifications from ASME or the equipment manufacturer for Grade 8 hardware. Do not mix Grade 8 fasteners with lower-grade nuts or hardware that does not meet the same strength specification.