Value Collection MP39025 Hex Cap Screw 5/16-18 X 1/2 in Grade 8

Product Description

The VALUE COLLECTION MP39025 is a fully threaded hex head cap screw designed for demanding mechanical and structural fastening applications. Manufactured from Grade 8 steel and finished with a zinc yellow dichromate coating, this fastener delivers high tensile strength combined with corrosion resistance. The 5/16-18 UNC thread profile and 1/2-inch length under head make it a common choice for assemblies requiring a reliable, torque-rated fastener in a compact form factor. Conforming to ASME B18.2.1 dimensional standards, it is suited for use by maintenance technicians, millwrights, contractors, and equipment fabricators working across HVAC, plumbing, electrical, and general industrial applications.

This screw is used wherever a high-strength inch-series fastener is needed in light to medium structural connections. The 5/16-18 coarse thread allows for quick engagement in tapped holes and nuts without fine-thread sensitivity to contamination. Typical install scenarios include equipment mounting, bracket fabrication, panel attachment, and mechanical assembly work in both shop and field environments. The zinc yellow dichromate finish provides a visual identification marker for Grade 8 hardware while adding a layer of corrosion protection in moderately exposed conditions.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance and grade identification
• Fully threaded along the entire shank length for maximum thread engagement in short-grip applications
• 5/16-18 UNC coarse thread for reliable engagement in standard tapped holes and hex nuts
• Conforms to ASME B18.2.1 for consistent dimensional tolerances
• Sold in a pack of 50 for job-site and shop inventory use

Compatibility

Designed as a standard ASME B18.2.1 inch-series hex head cap screw compatible with any 5/16-18 UNC tapped hole or hex nut in mechanical, structural, or equipment-mounting applications.

Installation Notes

Installation is performed with a standard hex wrench or socket driver sized for a 5/16-18 fastener. Always confirm the mating thread size and pitch before installation to avoid cross-threading. On Grade 8 fasteners, follow the equipment manufacturer or applicable industry standard for proper tightening sequence and torque specifications not provided with this listing. Verify that the zinc yellow dichromate finish is appropriate for the corrosion environment of the installation — additional sealing or coating may be required in highly corrosive or submerged conditions.