Value Collection MP39158 Hex Cap Screw 5/8-11 X 4-1/2 in Grade 8

Product Description

The VALUE COLLECTION MP39158 is a partially threaded hex head cap screw designed for heavy-duty fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers high tensile strength and corrosion resistance in demanding environments. The 5/8-11 thread size follows the Unified National Coarse (UNC) standard, and the 4-1/2-inch length under head suits deep-grip clamping applications. Licensed mechanics, millwrights, maintenance technicians, and industrial contractors install this type of fastener where high-strength bolted joints are required. Sold in a package of 10.

This hex head cap screw is used in heavy equipment assembly, structural steel connections, machine frames, and general industrial maintenance. The partially threaded shank provides a grip length that resists shear forces in bolted joints. The zinc yellow dichromate coating offers a baseline level of corrosion protection suitable for indoor and moderately controlled environments. This fastener meets ASME B18.2.1 dimensional standards, making it appropriate for applications where dimensional conformance to that specification is required.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC thread form for compatibility with standard hex nuts and tapped holes
• Partially threaded shank provides a bearing surface that resists lateral shear loads
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• Sold in a 10-piece package to support job-lot quantities

Compatibility

Designed for use with standard 5/8-11 UNC hex nuts, washers, and tapped components conforming to inch-series fastener standards. Suitable for any assembly requiring a Grade 8, partially threaded hex head cap screw in the 5/8-11 x 4-1/2-inch size.

Installation Notes

Installation is performed by mechanics, millwrights, or maintenance technicians using standard hex wrenches or impact tools sized for the appropriate hex drive. Always consult applicable structural or equipment specifications for required clamp load and torque values before installation. Inspect threads on both the fastener and the mating component for damage before assembly. Avoid mixing Grade 8 fasteners with lower-grade nuts or tapped holes not rated for the corresponding load.