Value Collection MPKP44152 7/8-9 X 3.5 in Grade 8 Hex Cap Screw

Product Description

The VALUE COLLECTION MPKP44152 is a 7/8-9 x 3.5-inch hex head cap screw engineered for high-strength fastening applications. Manufactured from Grade 8 steel with a zinc-plated finish, this fastener meets ASTM A354 BD standards for mechanical performance and corrosion resistance. The partially threaded shank provides a clean grip section, which helps maintain precise clamping force in bolted joints. This screw uses Unified National Coarse (UNC) thread form with a 7/8-9 designation, meaning a 7/8-inch nominal diameter at 9 threads per inch. It is a standard inch-system fastener suited for structural, mechanical, and heavy-duty assembly work across a range of trade and industrial settings.

This hex head cap screw is used in applications where high tensile strength and reliable clamping are required. Common install scenarios include structural steel connections, heavy equipment assembly, machinery mounting, and industrial fabrication. The zinc plating provides moderate corrosion protection suitable for indoor and sheltered outdoor environments. Sold in a pack of 5, this fastener is appropriate for maintenance, repair, and original equipment assembly work performed by millwrights, ironworkers, general contractors, and industrial maintenance technicians.

Key Features

• Grade 8 steel construction meets ASTM A354 BD for high-strength bolting applications
• 7/8-9 UNC thread form ensures broad compatibility with standard inch-system nuts and tapped holes
• Partially threaded shank maintains a grip section for accurate clamping and shear resistance
• Zinc-plated finish provides moderate corrosion protection in typical indoor and sheltered environments
• 3.5-inch length under head accommodates thicker material stacks and spacer assemblies
• Sold in a convenient pack of 5 to support small-batch repair and assembly work

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts, flat washers, and lock washers in inch-system fastener assemblies meeting ASTM A354 BD requirements.

Installation Notes

Installation is typically performed by qualified millwrights, ironworkers, or maintenance technicians using standard hex or socket wrenches sized for a 7/8-9 hex head. Confirm the mating nut or tapped hole is rated for Grade 8 or equivalent strength before assembly. Follow applicable torque specifications from the engineering drawings or relevant standards for the structure or equipment being assembled. Always inspect threads for damage before installation and replace any fastener that shows signs of galling, corrosion, or deformation.