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The Value Collection MP39064 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 delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. It measures 3/8-16 thread size with a 3.5-inch length under head, conforming to ASME B18.2.1 standards. The UNC thread form ensures broad compatibility with standard tapped holes and hex nuts. This screw is specified by machinists, maintenance technicians, and fabricators who require reliable performance under high-load conditions.
This fastener is suited for use in heavy-duty mechanical assemblies, equipment mounting, structural connections, and anywhere a high-strength UNC fastener is required. The partial threading allows the unthreaded shank to pass cleanly through a clearance hole before engaging the tapped bore or nut, making it appropriate for bolted joint applications where shank bearing load is a factor. Sold in packages of 10, it is practical for both single-job use and light shop stocking.
Designed as a standard inch-series hex head cap screw for use with any 3/8-16 UNC tapped hole or compatible hex nut in industrial, mechanical, or structural applications requiring Grade 8 fasteners.
Installation should be performed by a qualified technician familiar with fastener torque specifications for Grade 8 hardware. Always verify the mating thread is clean and free of debris before installation. Use the appropriate hex socket or open-end wrench sized to the fastener head. Follow applicable industry torque guidelines for 3/8-16 Grade 8 fasteners and ensure proper joint preload for the application.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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