Trusted Brand 5/16″-18 X 2-1/2″ Machine Screws Truss Head Phillips Drive Steel Zinc Plated (500/Pkg.)

Engineered for secure, long-lasting fastening, these Machine Screws feature Phil Truss head geometry, zinc-plated steel construction, and a precise 5/16-18 UNC thread—ideal for metal-to-metal and panel assemblies in machinery, electrical enclosures, and equipment applications.

Product highlights

Size & thread: 5/16-18 UNC

Length: 2 1/2 in

Head style: Phil Truss

Material & finish: Steel with zinc plating for corrosion resistance

Drive compatibility: Designed for use with a compatible driver and nut or tapped hole

Why choose these machine screws

These screws deliver high-strength performance and a secure hold across a range of fastening tasks. The zinc-plated finish provides excellent corrosion resistance, extending life in both indoor and protected outdoor environments. Perfect for fastening panels, brackets, and components in machinery, equipment, cabinets, and electrical enclosures.

Tip: For best results, ensure a matching nut or tapped hole is present and apply proper torque to prevent over-tightening.