Value Collection MP39029 Hex Head Cap Screw 5/16-18 Grade 8

Product Description

The VALUE COLLECTION MP39029 is a fully 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 delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. The 5/16-18 UNC thread profile and 1-inch length under head make it a standard choice for medium-duty bolted connections where a reliable, torque-resistant joint is required. This package contains 50 screws, making it suitable for production runs, maintenance stock, and field service kits.

This screw is suited for use in fabrication shops, maintenance and repair operations, OEM assembly lines, and field service environments. The hex head drive style accepts standard hex wrenches and sockets, which are common in virtually every trade toolbox. Grade 8 classification makes it appropriate for demanding structural and mechanical connections in both residential and light commercial equipment assemblies where high clamp load is needed.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength for demanding fastening applications
• Zinc yellow dichromate finish offers corrosion protection and is visually distinguishable from lower-grade fasteners
• Fully threaded along the entire shank for maximum thread engagement across the full 1-inch length under head
• 5/16-18 UNC thread standard ensures broad compatibility with standard tapped holes and hex nuts
• Meets ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties
• 50-piece package quantity supports stock replenishment and batch assembly work

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/16-18 UNC fully threaded fastener with Grade 8 mechanical properties and zinc yellow dichromate finish.

Installation Notes

Installation should be performed by a qualified technician familiar with proper fastener torque practices for Grade 8 hardware. Always ensure the mating tapped hole or nut matches the 5/16-18 UNC thread specification before installation. De-energize or shut down any equipment being serviced before replacing or installing fasteners in mechanical assemblies. Do not mix Grade 8 fasteners with lower-grade nuts or threaded inserts, as this can compromise joint integrity.