4-40 X 3/8″ Machine Screws Round Head Phillips Drive Steel Black Oxide (10000/Pkg.) Premium

Engineered for reliability and precision, these Machine Screws Phil Round Steel Black Oxide 4/40 x 3/8 are ideal for compact assemblies where a secure Phillips-drive fastener is required.

Overview: Round Phillips head machine screws in a durable steel with black oxide finish for corrosion resistance and a clean, low-glare appearance.

Specifications

Thread size: 4-40

Length: 3/8 inch

Head type: Phillips round head

Material: Steel

Finish: Black oxide

These screws are designed to pair with corresponding 4-40 tapped holes or nuts, delivering dependable clamping in electronics enclosures, small appliances, and machinery assemblies. The Phillips drive provides easy installation and a secure seating, while the black oxide finish helps reduce corrosion and minimize glare in precision applications.

Ideal uses include electronics housings, model-making, automotive interiors, and lightweight structural assemblies where a compact, strong fastener is needed. For best results, use with a properly sized screwdriver to avoid cam-out and avoid over-tightening.

Why choose our 4/40 x 3/8 Machine Screws? Consistent manufacturing tolerances, durable steel, and a finish that resists wear in everyday environments help ensure reliable performance over time. Stocked for quick shipping, these screws support fast, hassle-free project completion.

Add these Phillips round head machine screws to your hardware kit and keep your assemblies secure with a trusted fastener.