5/8"-11 X 4" Machine Screws | Flat Head | Slotted Drive | Plain Steel (25/Pkg.)

Our Machine Screws Slotted Flat Plain Steel 5/8-11 x 4 are precision-machined fasteners designed for secure, flush mounting in metal-to-metal assemblies. Made from plain (low-carbon) steel, these slotted flat-head machine screws offer reliable strength for everyday equipment, enclosures, and hardware projects. The 5/8"-11 thread size is a coarse thread ideal for many tapped holes and nuts, while the 4" length provides versatile reach for multi-layer assemblies.

Key specifications

• Size: 5/8"-11 x 4
• Thread: 5/8" diameter, 11 threads per inch (coarse)
• Length: 4 inches
• Head style: Flat head (countersunk)
• Drive: Slotted
• Material: Plain steel (low-carbon)
• Finish: Uncoated
• Applications: For use with tapped holes or nuts in metal panels, enclosures, and machinery

Why choose these screws

Choose these screws when you need a flush, low-profile mount with dependable strength. Their plain steel construction provides solid performance in non-corrosive environments and is suitable for general-purpose hardware assemblies.

Installation tips

Ensure your mating hole is clean and properly sized. If mating holes are not pre-tapped, pair with a corresponding nut. Use appropriate torque to avoid thread damage, and consider washers for load distribution when mounting through panels.