Meet the Screw-ST4×8—an ultra-compact hexagon socket countersunk head self-tapping screw engineered for clean, flush joins in lightweight materials. The ST4×8 size, paired with a hex drive and a countersunk, low-profile head, delivers precise torque, a seamless surface finish, and effortless self‑tapping performance in suitable substrates.

Key features

• ST4×8 size — 4 mm diameter and 8 mm length, tailored for small-scale assemblies.
• Hexagon socket drive — hex (Allen) drive for secure torque and reduced cam-out in tight spaces.
• Countersunk head — flush seating that creates a neat, professional appearance on the surface.
• Flat-tail shaft — streamlined shank design that supports stable seating and clean lines.
• Self-tapping tip — cuts its own threads in compatible materials, speeding up assembly without pre-threading.
• Versatile applications — ideal for lightweight metal panels, plastic enclosures, hobby projects, and electronics housings.

Why this screw matters

Traditional fasteners can leave protruding heads or require pre-threading. The Screw-ST4×8 solves both issues with a countersunk head for a flawless finish and a self-tapping tip that creates secure threads on demand. Its compact footprint makes it perfect for tight assemblies where visibility and clearance are at a premium, while the hex socket drive provides reliable torque transfer—reducing the risk of cam-out during installation.

Ideal use cases

• Electronics enclosures and computer chassis where a flush surface is essential.
• Thin metal plates or lightweight automotive panels requiring a clean, low-profile fastener.
• Plastic housings and casings in DIY projects and prototyping.
• Small mechanical assemblies and hobbyist builds that demand precise fit and simple installation.

Installation tips

• Match the material to the screw: self-tapping performance is optimized in compatible substrates; hard plastics and thin metals respond best to controlled torque.
• Use a hex key that fits snugly to prevent stripping the hex socket during driving.
• Drive with steady, even pressure and avoid over-tightening to preserve the countersunk finish and thread integrity.
• For dense or hard materials, consider a pilot hole to guide the screw and ensure clean threading.