4-40 X 3/8″ Machine Screws Fillister Head Slotted Drive Steel Black Oxide (10000/Pkg.) Super Sale

Engineered for reliable performance, Machine Screws Slotted Fillister Steel Black Oxide 4/40 x 3/8 are precision fasteners ideal for metal enclosures, electronics, and machinery assemblies that require a clean, flush appearance and a secure point of contact. The combination of a slotted drive, fillister head, steel construction, and a black oxide finish delivers dependable strength and a professional finish.

Head: Fillister

Drive: Slotted

Material: Steel

Finish: Black Oxide

Thread Size: 4-40

Length: 3/8 in

Applications include equipment enclosures, control panels, electrical housings, and other precise assemblies where a low-profile, secure fastening is essential. Designed for use with compatible 4-40 tapped holes or nuts, these screws provide strong performance in a compact form factor.

Versatile fastener: 4-40 thread, 3/8″ length for a wide range of projects

Secure seating: Slotted fillister head sits flush and reduces protrusion

Corrosion resistance: Black oxide finish offers mild protection in light-duty environments