Hillman 90413 – 1/4‑20 × 2‑1/2" Round Head Slotted / Combo Machine Screw (100 Count)

The Hillman 90413 machine screw is a heavy‑duty fastener designed for strong, reliable metal‑to‑metal fastening in industrial, construction, mechanical, and general‑purpose applications. Made from durable steel and coated with a zinc‑plated finish, this screw provides moderate corrosion resistance suitable for indoor or outdoor environments.

With a 1/4‑20 coarse thread, it delivers secure engagement in tapped holes or when paired with nuts of matching thread size. The 2‑1/2 inch length makes it ideal for deeper fastening needs such as joining thick panels, securing brackets, equipment assembly, and fabricating structural components.

The round head ensures smooth seating and even pressure distribution across surfaces, helping protect finished materials. Its combination slotted/Phillips drive offers flexibility—allowing installers to use either a flat‑blade screwdriver or a Phillips driver depending on the job.

Supplied in a 100‑count package, the Hillman 90413 is a practical bulk option for maintenance teams, shops, contractors, and hardware inventory stocking.