Value Collection -30165-41/2 Hex Cap Screw 7/8-9 X 4.5 in Grade 5

Product Description

The VALUE COLLECTION -30165-41/2 is a partially threaded hex head cap screw designed for heavy-duty fastening in structural and mechanical assemblies. Manufactured from Grade 5 steel with a zinc-plated finish, this screw meets ASME B18.2.1 dimensional standards. The 7/8-9 UNC thread profile and 4.5-inch length under head make it well suited for bolted connections requiring a grip length that leaves the shank unthreaded through a portion of the joint. The zinc plating provides a baseline level of corrosion resistance for general shop and field use. Sold in a package quantity of 25 per order.

This fastener is used across a broad range of industrial, mechanical, and construction applications where Grade 5 strength and inch-series UNC threading are specified. Typical installations include machinery frames, structural steel connections, equipment mounting, and general fabrication work. The partial threading is intentional and important in shear-loaded joints, allowing the unthreaded shank to bear lateral load rather than the threaded section. Machinists, millwrights, pipefitters, and general contractors commonly work with fasteners of this specification.

Key Features

• 7/8-9 UNC thread profile for broad compatibility with inch-series nuts and tapped holes
• 4.5-inch length under head — partially threaded to preserve shank integrity in shear joints
• Grade 5 steel construction for elevated tensile and proof load strength versus Grade 2
• Zinc-plated finish provides baseline corrosion resistance for indoor and sheltered outdoor use
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• Packaged in quantities of 25 to support job-site and shop inventory needs

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts, heavy hex nuts, and tapped holes conforming to inch-series UNC thread standards in Grade 5 or equivalent fastener specifications.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or tradesperson familiar with fastener torque requirements for Grade 5 hardware. Always derate torque values when using zinc-plated fasteners without additional lubrication, as coating friction affects clamp load. Ensure mating threads and tapped holes are clean and free of debris before assembly. Follow applicable structural or equipment manufacturer specifications for minimum thread engagement and joint design.