5/16″-18 X 2-1/2″ Machine Screws Flat Head Slotted Drive Steel Zinc Plated (100/Pkg.) Order Now

Engineered for reliable fastening in metal-to-metal assemblies, the Machine Screws Slotted Flat Steel Zinc 5/16-18 x 2-1/2 delivers tough performance with a clean, flush finish. Zinc plating provides corrosion resistance for longer service life in a variety of environments.

These machine screws feature a flat (countersunk) head with a slotted drive, making them compatible with standard flat-blade drivers. The 5/16-18 thread size is a common choice for metal-to-metal joints and is designed for tapping or pre-threaded holes in compatible materials.

Material: High-grade steel with zinc plating

Head style: Flat (countersunk) head

Drive type: Slotted

Thread size: 5/16-18

Length: 2-1/2 inches

Coating: Zinc for corrosion resistance

Applications: Metal enclosures, electrical panels, machinery, cabinetry, furniture assembly

Why choose zinc-plated steel machine screws? They offer a balance of strength, cost-effectiveness, and durability, plus easy installation with a standard slotted screwdriver. For best results, pair with corresponding tapped holes or nuts sized for 5/16-18 threads and ensure proper clearance for a flush, secure fit.