Malco bt131-100 Bit-tip Self Drilling Screw 8-18 Hex Washer Head 1/2 Inch 100-pack

Product Description

The Malco bt131-100 Bit-Tip Self Drilling and Tapping Screw is a precision-engineered fastener built for trade professionals in HVAC, sheet metal, light construction, and metal framing applications. This screw drills its own pilot hole as it fastens, combining the drilling, tapping, and fastening steps into a single pass. That one-step operation eliminates alignment problems and removes the need for separate drill bits, taps, or pre-drilled holes. The result is better thread engagement, a tighter fit, and significantly faster installation on the job site. The bt131-100 features an 8-18 thread size with a No. 2 drill point. The hex washer head and 1/4 inch hex drive make it compatible with any standard screw gun rated at 2500 RPM fitted with a hex driver and drilling depth locator. The overall thread length is 1/2 inch, making this fastener well-suited for attaching light-gauge sheet metal, metal framing components, HVAC ductwork, drywall, plywood, soft wood, composition board, insulation panels, and laminates to metal substrates. Each screw is precision cold forged from high-quality, heat-treated steel with a zinc-plated finish that provides corrosion resistance in typical indoor and light-duty commercial environments. Cold forging ensures tight dimensional consistency across every screw in the pack, so the drill point geometry is reliable and repeatable from the first screw to the last. This fastener is a practical replacement for rivets, spot welds, nuts and bolts, or adhesive-based fastening systems. It reduces the number of tools required on the job and speeds up production in repetitive fastening tasks. HVAC installers, sheet metal workers, and general contractors commonly stock Bit-Tip screws for metal-to-metal and metal-to-substrate connections throughout installation and fit-out work.

• Drills, taps, and fastens in one single operation for faster installation and fewer alignment issues
• No. 2 drill point with 8-18 thread and 1/4 inch hex drive compatible with standard 2500 RPM screw guns
• Precision cold forged heat-treated steel construction with zinc-plated finish for consistent performance and corrosion resistance

Product Highlights

The Malco bt131-100 Bit-Tip screw delivers reliable one-step fastening in metal framing, HVAC ductwork, and light construction applications. Its cold forged steel construction and zinc-plated finish ensure dimensional consistency and durability across the full pack.

Product Information

Standard Information

• Brand: MALCO
• Manufacturer Part Number: bt131-100

Technical Specifications

• Thread Size: 8-18
• Head Type: Hex Washer
• Drive Type: Hex, Unslotted
• Drive Size: 1/4 inch
• Overall Thread Length: 1/2 inch
• Drill Point Size: No. 2
• Material: Steel
• Finish: Zinc-Plated
• Measurement System: Imperial