Value Collection MP39157 Hex Cap Screw 5/8-11 X 4 in Grade 8

Product Description

The VALUE COLLECTION MP39157 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener meets ASME B18.2.1 dimensional standards. The 5/8-11 UNC thread size and 4-inch length under head make it suited for heavy-duty bolted connections where elevated tensile and proof load requirements apply. The zinc yellow dichromate coating provides a baseline level of corrosion resistance while maintaining dimensional conformance. Machinists, millwrights, and maintenance mechanics are the primary installers of this fastener class.

This cap screw is used across a wide range of industrial and commercial applications including machinery assembly, structural steel connections, equipment mounting, and heavy fabrication work. The partial threading allows for a smooth shank section beneath the head, which is standard practice when clamping thick material sections or when shear load transfer through the shank is required. It is sold in a package quantity of 10, making it appropriate for small-batch repair work or controlled inventory replenishment.

Key Features

• Grade 8 steel construction for high tensile strength in demanding fastening applications
• 5/8-11 UNC thread form with partial threading along the shank
• 4-inch length under head suits thick-section clamping and structural connections
• Zinc yellow dichromate finish provides corrosion resistance and surface identification
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Packaged in quantities of 10 for small-run use or bench stock replenishment

Compatibility

Designed as an OEM-style replacement or stock fastener for applications requiring a 5/8-11 UNC partially threaded hex head cap screw in Grade 8 steel per ASME B18.2.1.

Installation Notes

Installation should be performed by qualified mechanics or millwrights following applicable torque specifications for Grade 8 fasteners at this diameter. Always use a calibrated torque wrench and appropriate hex socket or open-end wrench sized for a 5/8-inch hex head cap screw. Ensure mating threads are clean, free of debris, and properly lubricated or dry per the joint design specification before installation. Do not exceed rated proof load; replace any fastener showing signs of thread damage, stretching, or corrosion.