Malco BT133: Bit-Tip self-drilling and tapping screws engineered for fast, reliable one-pass fastening in metal, wood, and composites. With a #2 point and 3/4" length, plus a 1/4" hex washer head, these screws are built to shave seconds off each install while delivering a tight, secure hold.

Why Bit-Tip stands out: every BT133 drill-and-tap screw creates its own hole, resulting in the optimal hole size for superior thread engagement. The dry-fit is immediate—no alignment gymnastics, no misaligned fasteners, and no second-pass drilling required. That means fewer call-backs and more consistent results across HVAC ductwork, metal framing, and structural assemblies.

Designed for structural and layered metal, these self-drilling and self-tapping sheet metal screws excel where traditional fasteners stumble. The Bit-Tip’s point length and geometry are tailored to penetrate metal thicknesses with confidence, while still accommodating other materials like plywood, softwood, composition board, drywall, insulation, and laminates that may need to bond to metal framing or components.

Key benefits you’ll notice on the job

• One-pass fastening with optimal hole size and thread engagement for a tighter, longer-lasting fit.
• Self-drilling and self-tapping eliminates the need for separate drill bits, taps, rivets, nuts, bolts, or welding.
• Compatibility with standard tools requires only a screw gun rated up to 2500 RPM with a drilling depth locator.
• Versatile material compatibility from metal to plywood, soft wood, drywall, insulation, and laminates bonded to metal framing.
• Durable construction forged from heat-treated steel and precision cold-forged for uniform dimensions and consistent drill point contours.
• Bulk value sold in a 10,000-piece carton, ideal for contractors, HVAC installers, and shop floors requiring steady supply.

The BT133 is more than a screw—it's a complete fastening solution that simplifies installation, reduces equipment needs, and delivers dependable performance in HVAC fasteners, structural metal, and layered metal assemblies. By choosing Bit-Tip, you’re selecting a screw that both saves time and enhances the integrity of your joints on day one.

Ideal use cases: HVAC duct connections, metal c ant framing, structural panels, and scenarios where metal-to-metal or metal-to-wood laminates require a fastener that can drill, tap, and secure in a single motion. If you’re replacing rivets, nuts and bolts, spot welds, or adhesives, Bit-Tip offers a cleaner, faster alternative with professional-grade results.