Top Pick 4-40 X 5/16″ Machine Screws Fillister Head Phillips Drive Steel Zinc Plated (10000/Pkg.)

Meet the Machine Screws Phil Fillister Head, made from steel and zinc-plated for corrosion resistance. These 4-40 UNC screws are 5/16″ long and are ideal for reliable, compact fastening in metal enclosures, electronics, and machinery.

Engineered for dependable performance in applications that require a small, strong fastener with a secure drive.

Specifications

Head style: Fillister (Phil Fillister) head for a classic, rounded profile

Drive type: Phillips

Material: Steel

Finish: Zinc plated for corrosion resistance

Thread size: 4-40 UNC

Length: 5/16 inch

Applications: Perfect for metal-to-metal assemblies, electronics enclosures, chassis, and general hardware projects where a compact, reliable machine screw is required. To install, use a Phillips screwdriver that fits 4-40 threads, and avoid over-tightening to prevent thread damage.

Why choose these machine screws? They combine robust steel with a protective zinc finish to withstand typical shop environments, providing strong holding power and easy drivability for long-lasting performance.