Value Collection D39118 Hex Head Cap Screw 1/2-13 X 5 in Grade 8

Product Description

The VALUE COLLECTION D39118 is a Grade 8 steel hex head cap screw with a 1/2-13 UNC thread and a 5-inch length under head. It is partially threaded, conforming to ASME B18.2.1 dimensional standards. The zinc yellow dichromate finish provides a layer of corrosion resistance while serving as a visual indicator of Grade 8 strength classification. This fastener is suited for high-strength bolted assemblies and is commonly installed by millwrights, pipefitters, ironworkers, and mechanical contractors working on structural, mechanical, or equipment-mounting applications.

This screw is used in industrial and commercial applications requiring a high-strength fastener in 1/2-13 UNC thread. The partial thread shank provides additional shear strength and is preferred in applications where a full thread run is not required or where precise clamping length matters. Typical install scenarios include machinery bases, structural steel connections, equipment frames, and heavy-duty brackets. It is sold individually with a minimum order quantity of 10 units.

Key Features

• Grade 8 steel construction for high tensile and proof load strength requirements
• Partially threaded shank adds shear resistance in structural and mechanical assemblies
• Zinc yellow dichromate finish provides corrosion resistance and identifies Grade 8 classification
• 1/2-13 UNC thread conforms to ASME B18.2.1 dimensional standards
• 5-inch length under head suits deeper grip applications where longer clamping length is needed

Compatibility

Designed for use in any bolted assembly requiring a 1/2-13 UNC Grade 8 hex head cap screw with a 5-inch length under head per ASME B18.2.1.

Installation Notes

Installation is typically performed by a licensed mechanic, millwright, or pipefitter using a standard hex socket or open-end wrench. Ensure mating threaded holes or nuts are rated for Grade 8 loading to avoid mismatched strength assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant ASME or AISC guidelines. Never mix Grade 8 fasteners with lower-grade hardware in the same joint without verifying design requirements.