Meet the Malco BT156 10-24 x 1-1/2 Bit-Tip #3 Point Self-Tapping & Self-Drilling Sheet Metal Screws—designed to power through metal work with a single confident motion. This isn’t just a fastener; it’s a one-step solution that drills, taps, and fastens in one operation, delivering cleaner installations with fewer alignment hassles.

What makes the BT156 stand out is its Bit-Tip technology. As you drive, the screw creates its own hole size, ensuring optimal thread engagement and a tighter, more secure fit. The result is reliable holding power in sheet metal, structural and layered metal assemblies, and HVAC components, without the need for separate drill bits, taps, rivets, nuts and bolts, or welding.

• One-pass fastening: Bit-Tip drills and taps in a single operation, reducing setup time and eliminating alignment errors.
• Precision Bit-Tip and #3 point: Point length determines the metal thickness that can be drilled and fastened; these screws are precision cold-forged and heat-treated for uniform dimensions and consistent drill point contours.
• Solid construction: Made from high-strength, specially heat-treated steel to stand up to demanding HVAC and structural metal applications.
• Versatile head and size: 5/16" hex washer head with a 10-24 thread and 1-1/2" length, suitable for a wide range of sheet metal and layered metal assemblies.
• Broad material compatibility: Beyond metal, these screws can fasten plywood, soft wood, composition board, drywall, insulation, and more to metal framing or components.
• Equipment-friendly: Designed to work with a standard screw gun rated at 2500 RPM and equipped with a drilling depth locator for consistent installation depth.
• Value and availability: Packaged as a 3500-count supply, making it a practical choice for large HVAC and structural projects.

Ideal for HVAC installations, metal duct work, and structural or layered metal assemblies where space is tight and precision matters. The BT156 provides a robust alternative to rivets, nuts and bolts, spot welds, or adhesives, simplifying inventory and reducing equipment needs on the jobsite.

Why choose this Bit-Tip solution over traditional fasteners? The self-drilling, self-tapping capability means fewer tools, faster setups, and predictable thread engagement every time. With the BT156, you gain strong, dependable joints in metal, plus the flexibility to attach other materials like plywood or drywall to metal framing without swapping fasteners mid-project.

Usage tips for best results: use with a standard screw gun rated at 2500 RPM and a drilling depth locator to ensure consistent engagement depth. Start in a clean, dry surface, maintain steady pressure, and let the Bit-Tip do the work—your installation quality and speed will reflect it.