Value Collection D39116 Hex Cap Screw 1/2-13 X 4 in Grade 8

Product Description

The VALUE COLLECTION D39116 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Built to ASME B18.2.1 standards, this fastener features a 1/2-13 UNC thread size and a 4-inch length under head. Grade 8 steel construction provides the tensile strength required for demanding load-bearing connections. The zinc yellow dichromate finish delivers corrosion resistance suitable for general-purpose shop and field use. Machinists, maintenance technicians, and tradespeople working in fabrication, equipment assembly, and structural repair rely on this specification for critical bolted joints.

This cap screw is suited for use in general industrial machinery, structural steel connections, equipment mounting, and heavy-duty mechanical assemblies where high-strength fasteners are required. The partial thread design allows the unthreaded shank to bear shear loads while the threaded end engages the nut or tapped hole. Typical applications include frame assembly, motor and pump mounting, bracket fabrication, and any bolted connection requiring a Grade 8 fastener per engineering specification.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-13 UNC thread form for broad nut and tapped-hole compatibility
• 4-inch length under head with partial threading to support shear-load applications
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Meets ASME B18.2.1 dimensional standards for consistent fitment
• Inch measurement system with standard hex drive for common wrenches and sockets

Compatibility

Designed as an OEM-style and aftermarket replacement hex head cap screw for any application requiring a 1/2-13 UNC x 4-inch partially threaded Grade 8 fastener meeting ASME B18.2.1 specifications.

Installation Notes

Installation is performed with standard hex wrenches, combination wrenches, or impact sockets sized for a 1/2-13 hex head fastener. Always verify thread engagement depth and ensure the mating nut or tapped hole is rated for Grade 8 loads before torquing. Follow applicable torque specifications from the equipment manufacturer or relevant structural codes. Inspect the zinc dichromate finish for damage before installation in corrosive environments and replace any fastener showing thread deformation or head damage.