Malco BT133G #2 Point 8-18 x 3/4" | Bit-Tip Drill and Tap Screws | 1/4" Hex Washer Head | HVAC Fastners | Structural & Layered Metal | Self Tapping and Self Drilling Sheet Metal Screws, 100 Bag

Meet the Malco BT133G #2 Point 8-18 x 3/4" Bit-Tip Drill and Tap Screws—the single solution for fast, reliable metal fastening. Engineered for HVAC fasteners and structural/ layered metal, these screws drill and thread in one smooth operation, delivering a tight, high‑strength connection with each fasten.

Why this Bit-Tip stands out

• One-pass drilling and tapping means no alignment hassles or juggling separate drill bits, taps, or rivets—just drill, tap, and secure in a single motion.
• Optimum hole size for better thread engagement with every screw, ensuring a tighter, more durable hold on metal framing, panels, and components.
• #2 point design and a length of 8-18 x 3/4" tailor the screw to common HVAC and structural metal thicknesses, expanding the range of projects you can tackle.
• 1/4" hex washer head provides a stable drive and broad bearing surface for uniform seating, compatible with standard screw guns.
• Self-drilling and self-tapping sheet metal screws eliminate the need for separate drill bits, taps, welds, rivets, or nuts and bolts, cutting tool cost and install time.
• Made from heat-treated steel and precision cold-forged for uniform dimensions and proven drill-point contours—built to withstand demanding HVAC and metalwork environments.
• Versatile across materials beyond metal: can fasten plywood, softwood, composition board, drywall, insulation, and laminates to metal framing or components, expanding its use in interior build-outs and renovations.
• 100‑count bag keeps your project on track with plenty of fasteners ready for continuous work without frequent reorders.

Ideal use scenarios

• HVAC installations—secure metal ductwork, hangers, and supports quickly without separate tapping steps.
• Metal framing and structural assemblies—join studs, panels, or layered metal with confidence in a single operation.
• Interior builds—attach insulation, laminates, drywall, or plywood to metal components where traditional fasteners would require additional tapping or equipment.

How it works in practice

Choose the BT133G for applications where hole precision and fastener strength matter. The Bit-Tip design ensures the hole size is correct for optimal thread engagement, resulting in stronger connections with fewer loosened joints over time. You can retire separate tapping steps and minimize misalignment, which translates to faster project completion and a cleaner, more professional finish.

Practical tips for best results

• Use a standard screw gun rated at up to 2500 RPM with a drilling depth locator to control penetration depth and avoid over-drilling.
• Ensure metal surfaces are clean and free of debris for consistent bite and threading.
• Match screw length to the combined thickness of the materials being joined, using the Bit-Tip point length as your guide for drilling and tapping suitability.

With the Malco BT133G Bit-Tip Drill and Tap Screws, you gain a precise, high‑speed fastening solution that reduces tool needs, accelerates installations, and delivers dependable performance across HVAC and metal-building projects.