Value Collection MP39366 Hex Cap Screw 3/8-24 X 4 in Grade 8

Product Description

The VALUE COLLECTION MP39366 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial and mechanical assembly work. It features a 3/8-24 UNF thread size and a 4-inch length under head, manufactured from Grade 8 steel with a zinc yellow dichromate finish that provides corrosion resistance. The hex head drive style accommodates standard hex wrenches and sockets. Compliance with ASME B18.2.1 confirms dimensional accuracy and consistency, making this screw a reliable choice for applications where fastener grade and finish matter. Machinists, millwrights, and mechanical contractors commonly specify this fastener for high-load assemblies.

This screw is suited for use in mechanical, structural, and equipment assembly applications where UNF fine-thread engagement and Grade 8 tensile strength are required. The partial threading allows the unthreaded shank to bear shear loads in close-tolerance applications. It is commonly installed in fabrication shops, maintenance facilities, and OEM assembly environments where inch-series fasteners conforming to ASME B18.2.1 are specified.

Key Features

• Grade 8 steel construction for high tensile and proof load requirements
• 3/8-24 UNF thread form for fine-thread engagement in inch-series applications
• 4-inch length under head with partial threading to support shear loading along the shank
• Zinc yellow dichromate finish for corrosion resistance in industrial environments
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Sold in a package of 10 pieces

Compatibility

Designed as an inch-series UNF hex head cap screw for use in any application specifying a 3/8-24 x 4-inch Grade 8 partially threaded fastener conforming to ASME B18.2.1.

Installation Notes

Install with a properly sized hex wrench or socket driver. Torque to the specification called out in the engineering drawing or fastener specification table for Grade 8 fasteners at this diameter and thread pitch. Inspect threads and mating tapped holes for damage or contamination before installation. Do not reuse fasteners that show signs of yielding, galling, or corrosion damage.