Markdown 5/16″-18 X 3″ Machine Screws Round Head Combination Drive Steel Zinc Plated (100/Pkg.)

Introducing the Machine Screws Combo Round Steel Zinc 5/16-18 x 3 — a reliable fastening solution designed for metal enclosures, machinery, and everyday hardware projects. This combo pack features round-head machine screws crafted from steel with a durable zinc plating for corrosion resistance and long-lasting performance.

Whether you’re assembling panels, electronics enclosures, or structural components, these screws provide precise 5/16-18 threading with a 3-inch length to suit a variety of applications.

Key details

Material: Steel

Finish: Zinc-plated for corrosion resistance

Head style: Round

Thread size: 5/16-18

Length: 3 inches

Pack type: Combo (multiple screws included)

Why choose these machine screws

Durable construction and a smooth finish help prevent galling and seizing, while the standardized threading ensures compatibility with common nuts and tapped holes. The zinc coating adds protection against moisture and humidity, making them suitable for many indoor and light outdoor settings.

For best results, pair with the corresponding nuts or tapped holes that match the 5/16-18 thread. Always verify the length and head style to ensure a secure fit for your project.