*USED* Cross Recessed Large Flat Head Carbon Steel Galvanized Self-Tapping Screws-ST4*30

This listing features a USED batch of Cross Recessed Large Flat Head Carbon Steel Galvanized Self-Tapping Screws, ST4 x 30. Built for speed and a clean finish, these screws pair a hefty flat head with a Phillips (cross-recessed) drive for reliable seating in light-to-moderate metal applications.

Why these ST4 x 30 screws stand out

Cross recessed, large flat head—the wide head sits flush and distributes load across the surface, reducing pull-through in thin materials. The Phillips drive is the workhorse for standard screwdrivers, making them easy to install with common tools in any toolbox.

Carbon steel, galvanized finish provide a solid, dependable fastener with corrosion resistance for indoor and semi-outdoor projects. The galvanized coating helps protect against rust on panels, trims, and lightweight metal assemblies, extending service life in non-extreme conditions.

Self-tapping design—no pre-drilling required in compatible sheets, saving time on metal-and-metal or metal-and-thin-metal projects. These screws bite into metal or other substrates with a single confident turn, creating their own threads as they go.

What you get and how to use

• Size: ST4 x 30 (approximately 4 mm diameter, 30 mm length) with a cross recessed Phillips drive and a large flat head.
• Condition: USED. Expect minor wear consistent with prior use; all screws are intended for general fasten tasks and may have surface imperfections, but threads should remain suitable for re-use in appropriate projects.
• Applications: ideal for lightweight metal panel installations, cabinetry, appliance assembly, HVAC hardware, thin gauge sheet-metal, and similar non-structural fastening tasks where a flush finish is desired.
• Environment: galvanized coating provides rust resistance in dry or mildly humid environments; not a substitute for high-corrosion or outdoor-grade stainless variants.

Tips for best results

• Inspect each screw before use—look for bent or damaged heads, stripped threads, or corrosion that could compromise performance.
• Use a compatible Phillips bit and avoid over-tightening to prevent thread deformation or head cam-out.
• If you're fastening into thicker or hard materials, consider pilot holes or alternative fasteners designed for metal with greater thread engagement.
• Store any unused screws in a dry, organized container to prevent rust or contamination.

Who this is for

Perfect for DIY enthusiasts, small workshops, and professional handymen who need a budget-friendly, versatile fastener for non-structural metal work. If you frequently assemble lightweight metal panels, cabinets, or hardware fixtures, this USED ST4 x 30 screw set gives you immediate availability and value without compromising on essential performance.