Meet the Malco BT153 10-24 x 3/4 Bit-Tip #3 Point Self-Tapping & Self-Drilling Sheet Metal Screws with a 5/16" Hex Washer Head. Built for speed, reliability, and clean, secure joints, these screws are a real upgrade for HVAC, structural, and layered metal assemblies.

Why this Bit-Tip matters

• One-pass perfection: Bit-Tip drills its own hole and taps threads in a single motion, delivering the optimum hole size for maximum thread engagement and a tight, vibration-resistant fit.
• Consistent alignment, every time: The self-drilling/self-tapping action minimizes misalignment and removes the guesswork of hole preparation—saving time and reducing rework on busy job sites.
• Versatile fastening across materials: While ideal for sheet metal, these screws also fasten plywood, soft wood, composition board, drywall, insulation, and laminates to metal framing or components, expanding their use beyond traditional metal-to-metal joins.
• Rugged, precise construction: Made from strong, heat-treated steel and precision cold-forged for uniform dimensions and drill-point contours, the Bit-Tip design withstands demanding HVAC and metalwork environments.
• Eliminate extra tooling: A practical replacement for rivets, nuts and bolts, spot welds, or adhesives in many applications, dramatically reducing the need for extra tooling or special equipment.
• User-friendly setup: Works with a standard screw gun rated around 2500 RPM and a drilling depth locator, making on-site installation straightforward and repeatable. The point length also determines the metal thickness you can drill, tap, and fasten.

Ideal applications

• HVAC ductwork and metal framing where quick, reliable fastening is essential.
• Structural and layered metal assemblies that demand precise hole size and strong thread engagement.
• Projects that attach various substrates to metal components, from plywood to drywall and insulation, without switching fasteners.

What you get:

• BT153 series screws in a 5000-count quantity, sized 10-24 x 3/4 with a 5/16" hex washer head for a secure, flush finish.
• Durable, uniform performance you can depend on for repeated installations and professional results.

Whether you're upgrading an HVAC system, building metal framing, or tackling layered metal assemblies, Malco BT153 Bit-Tip screws deliver fast, reliable, one-step fastening with superior thread engagement. They’re the smart choice for pros who want fewer steps, cleaner work, and dependable performance from drill to finish.