4-40 X 3/8″ Machine Screws Undercut Flat Head Six Lobe Drive Steel Zinc Plated (10000/Pkg.) Buy Direct

Machine Screws Undercut Flat Zinc Plated Torx Alt 4/40 X 3/8 combines reliability and performance for precise fastening in electronics, machinery, and metal enclosures. The undercut flat head sits flush with the surface, delivering a clean, professional look while reducing protrusion in tight spaces.

Featuring a zinc-plated finish for corrosion resistance and a Torx Alt drive for high torque transfer and reduced cam-out, these machine screws are ideal for assemblies where secure, lasting fastenings matter. The 4/40 UNC thread size and 3/8″ length make them a versatile choice for a wide range of projects.

Key features

Undercut Flat Head: flush seating reduces profile and helps with neat, finished installations.

Torx Alt Drive: better torque handling and less stripping than Phillips or other drives.

Zinc Plated Finish: provides corrosion resistance for long-lasting performance.

Thread Size and Length: 4-40 UNC, 3/8″ length for compatibility with standard threaded holes.

Applications include mounting small components, electronics enclosures, cabinetry, and precision machinery where space is at a premium and a clean look is essential.

Whether you are assembling hobby projects or professional equipment, these machine screws offer dependable strength, durable finish, and easy installation with a Torx driver. Order these 4-40 x 3/8 in undercut flat screws in zinc plating for a robust fastening solution.