5/16"-18 X 3/4" Machine Screws | Undercut Flat Head | Slotted Drive | Steel Zinc Plated (1500/Pkg.)

Engineered for secure, long-lasting fastening, our Machine Screws Slotted Undercut Flat Zinc Plated 5/16-18 x 3/4 deliver reliable performance in metal-to-metal assemblies. The combination of a slotted drive, an undercut flat head, and a corrosion-resistant zinc finish makes them ideal for electrical enclosures, machinery cabinets, and other precision metalwork.

Key features

• Drive: Slotted (Flat) for common screwdrivers
• Head style: Flat, Undercut
• Thread size: 5/16-18 UNC
• Length: 3/4 in
• Finish: Zinc Plated
• Material: Steel

These machine screws provide excellent holding power in thin-material applications and offer corrosion resistance suitable for both indoor environments and protected outdoor use.

Applications

• Metal enclosures, electrical panels, and control boxes
• HVAC fixtures and equipment assemblies
• Machinery and equipment where secure, flush-headed fasteners are required

For best results, pair these slotted undercut flat head machine screws with compatible nuts or pre-tapped holes matching size 5/16-18. Always select the correct screw length for your material thickness to ensure a secure, flush finish.