Value Collection MP39407 Hex Cap Screw 1/2-20 Grade 8 25 Pack

Product Description

The VALUE COLLECTION MP39407 is a fully threaded hex head cap screw designed for high-strength fastening applications. Sized at 1/2-20 UNF with a 1-3/4 inch length under head, this screw is manufactured from Grade 8 steel and finished with zinc yellow dichromate for corrosion resistance. It conforms to ASME B18.2.1, the standard governing inch-series hex cap screws. Sold in packs of 25, these fasteners are suited for mechanical assemblies, structural connections, and equipment maintenance tasks where Grade 8 tensile strength is required. Installation is handled by maintenance technicians, millwrights, and general tradespeople across industrial and commercial settings.

This screw is appropriate for use in applications demanding fine-thread engagement and high clamp load, such as automotive, heavy equipment, and industrial machinery repairs. The 1/2-20 UNF thread pitch provides tighter thread engagement per inch compared to coarse-thread equivalents, making it a common choice where vibration resistance or precision torque control is needed. The fully threaded body maximizes thread engagement across the entire length under head.

Key Features

• Grade 8 steel construction for high tensile and proof load capacity
• Zinc yellow dichromate finish provides corrosion and oxidation resistance
• Fully threaded body along the 1-3/4 inch length under head
• 1/2-20 UNF thread standard for fine-pitch engagement
• Meets ASME B18.2.1 dimensional standards
• Sold in a pack of 25 for stocking and job-site use

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 1/2-20 UNF Grade 8 fastener conforming to ASME B18.2.1.

Installation Notes

Install using an appropriate hex socket or open-end wrench sized for a 1/2-inch hex cap screw. Follow torque specifications established by the equipment manufacturer or applicable engineering standards for Grade 8 fasteners. Ensure mating threads are clean and free of debris before installation. Do not use impact tools without a verified torque-limiting method to avoid overloading the joint.