Value Collection MP39066 Hex Head Cap Screw 3/8-16 X 4 in

Product Description

The VALUE COLLECTION MP39066 is a Grade 8 steel hex head cap screw sized 3/8-16 x 4 inches, finished in zinc yellow dichromate for corrosion resistance. The partially threaded shank follows ASME B18.2.1 dimensional standards, making it a recognized specification fastener suited for structural and mechanical assemblies. The UNC (Unified National Coarse) thread form provides strong thread engagement in steel, cast iron, and similar base materials. Grade 8 designation indicates a high-strength alloy steel fastener capable of handling significant tensile and shear loads. This screw is a common choice for maintenance, fabrication, and equipment assembly work across mechanical and industrial trades.

This fastener is appropriate for general mechanical assembly, equipment mounting, structural connections, and repair applications where a high-strength coarse-thread cap screw is required. The 4-inch length under head suits thicker material stacks and through-bolted connections. The zinc yellow dichromate finish provides moderate corrosion resistance for indoor and light-duty outdoor use. Sold in packages of 10, this screw suits maintenance shops, field service technicians, and fabricators who need a reliable Grade 8 fastener on hand for a variety of tasks.

Key Features

• Grade 8 steel construction for high tensile strength in demanding assemblies
• 3/8-16 UNC thread form for broad compatibility with standard nuts and tapped holes
• 4-inch length under head accommodates thicker material stacks and through-bolt applications
• Partially threaded shank allows for precise clamping and shear load handling
• Zinc yellow dichromate finish provides corrosion resistance over bare steel
• Meets ASME B18.2.1 dimensional standards for consistent fit and interchangeability

Compatibility

Designed for use with standard 3/8-16 UNC hex nuts, flat washers, lock washers, and tapped holes conforming to Unified National Coarse thread specifications.

Installation Notes

Installation is performed with a standard hex wrench or socket drive sized for a 3/8-inch hex head cap screw. Always ensure the mating thread or nut matches the 3/8-16 UNC specification before installation. Follow applicable torque guidelines for Grade 8 fasteners as specified by the equipment manufacturer or relevant ASME or SAE standards. Inspect threads for damage before installation and do not over-torque, as this can yield or fracture the fastener.