Holiday Sale 4-40 X 9/16″ Machine Screws Round Head Slotted Drive 18/8 Stainless Steel (5000/Pkg.)

Designed for precise, reliable fastening, the Machine Screws Slotted Round 18/8 Stainless 4-40X9/16 delivers strength in a compact size. The slotted round head is compatible with standard flat-blade drivers and sits flush in many applications.

Product Highlights

Size: 4-40 thread, 9/16″ long

Material: 18-8 stainless steel (304)

Head type: Slotted round head

Finish: Stainless

Applications: Suitable for electronics, cabinetry, appliances, and general machinery where a small, durable fastener is required

Corrosion resistance: Excellent resistance to corrosion in standard environments

Usage notes: These machine screws require a nut or a tapped hole for a secure connection. When installing, align the screw with a mating part, apply steady pressure, and tighten with a flat-blade screwdriver for the slotted drive. For electronics and precision assemblies, ensure hole size matches standard 4-40 tap clearance.

Why choose 18-8 stainless 4-40 x 9/16

The combination of a small diameter (4-40) with a 9/16″ length makes these screws ideal for tight spaces where a flush, reliable fastener is essential. The 18-8 stainless composition provides good corrosion resistance and durability, making them a common choice for hardware, electronics enclosures, and hobby projects.