Malco HW8X11/2ZW Zip-In Self-Piercing Screws redefine metal fastenings with a purpose-built thread design and a precision heat-treat process. The proprietary Zip-In geometry tapers to a fine, sharp point while preserving core point strength, enabling clean, rapid penetration into sheet metal. A single starting thread forms down to the very tip, delivering an immediate bite, and a second thread above the point engages after initial penetration to drill in the screw double fast. The result is faster driving and a superior hold on heavier gauges of sheet metal—without the need for extensive pre-drilling.

• Advanced dual-thread action: one starting thread to the tip plus a second thread above the point ensures quick penetration and strong seat in fewer turns.
• Precision heat treatment: designed to maintain point strength while delivering a razor-sharp tip for consistent starts and reduced cam-out.
• Self-piercing efficiency: minimizes or eliminates pre-drilling, speeding up assemblies in metal roofing, ductwork, enclosures, and fabrication projects.
• Durable zinc plating: corrosion-resistant finish that holds up in everyday use and exposed metal environments.
• 1/4" slotted hex washer head: compatible with common drivers, providing a secure seating and a clean, flush installation.
• Heavy-gauge capability: engineered to fasten thicker sheet metal more effectively than typical self-piercing screws.
• Bulk package: 4500-count pack ensures you have ample supply for larger jobs without frequent reorders.

Ideal applications and use cases

These Zip-In self-piercing screws are well-suited for HVAC ductwork, metal ceilings, wall panels, roofing projects, and general sheet-metal fabrication where quick, dependable fastening is essential. They excel in environments where corrosion resistance is a priority and where speed and strength matter—reducing installation time on assemblies that involve thicker gauge sheet metal. If you’re upgrading or repairing metal enclosures, equipment housings, or metal siding, Zip-In screws provide a clear efficiency advantage over traditional fasteners.

Why choose Zip-In over standard self-piercing screws?

The distinctive Zip-In thread arrangement and heat-treated tip translate to noticeably faster drive times, fewer misstarts, and a more consistent engagement in heavier gauges. The combination of a finely tapered point, a robust starting thread, and a second-thread engagement means you get reliable penetration and superior clamping force with fewer turns—a practical advantage on busy job sites and in high-volume production.

Specifications

Product: Malco HW8X11/2ZW Zip-In Self-Piercing Screws

• Length: 8 x 1-1/2 inches
• Head: Slotted Hex Washer
• Drive: Slotted with Hex Washer
• Finish: Zinc Plated
• Material: Self-piercing steel
• Quantity: 4500 screws per pack
• Applications: Sheet metal fastening, heavy-gauge metalwork, HVAC, ductwork, enclosures

Choose Zip-In for faster, more reliable sheet metal assembly where penetration power, thread-driven bite, and corrosion resistance matter most. This bulk pack keeps your workflow moving, so you can finish projects faster and with fewer interruptions.