Malco HW6X3/8ZT
•A unique thread design and quality controlled manufacture spell the Zip-in difference.
•Zip-in’s sophisticated heat treat process allows the screw to taper to a fine, sharp point without sacrificing critical point strength.
•Zip-in screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-drilling type.
•Ultra sharp tapered point will not mushroom, break or walk.
•Undercut-indented hex washer slotted head always seats flush.
•Full 1/4 in. (No. 8) head will not strip out of hex driver opening at any-time during operation.
Meet Malco Zip-In HW6X3/8ZT — a 6 x 3/8 inch self-piercing sheet metal screw engineered for speed, strength, and flawless joinery. With a 1/4″ slotted hex washer head and zinc-plated finish, this bulk package is tailor-made for professionals who demand consistent results on metal roofing, ductwork, automotive body work, and fabrication projects.
The Zip-In advantage starts with its innovative thread design and meticulous heat-treating. The screw tapers to a fine, sharp point without sacrificing point strength, so you get dependable penetration from the very first turn. A single starting thread extends right to the tip, delivering piercing power in a single motion. As soon as the point bites, a second thread above the point engages to bite again, effectively drilling in double-fast and creating a solid, secure hold in one pass.
- Faster driving, less effort:Dual-thread engagement means quicker penetration and fewer drive cycles, saving time on every project.
- Strong for heavier gauges:Optimized for fastening heavier gauges of sheet metal more reliably than standard self-piercing screws.
- Corrosion resistance for long life:Durable zinc-plated finish protects against the elements, making it suitable for indoor and exterior applications.
- Precise, reliable fit:1/4″ slotted hex washer head provides a secure seating and consistent drive experience, helping to prevent cam-out and stripped fasteners.
- Versatile bulk value:Sold in a 1000-count package for shops and crews that run continuous installations across multiple projects.
Ideal use cases: auto body repairs, HVAC ductwork, roofing and siding installations, metal cabinetry, and various fabrication tasks where clean penetration and high holding power are essential. This screw shines in multi-layer assemblies where speed and reliable bite through different thicknesses are required, reducing the need for pre-drilling and minimizing field downtime.
How it compares to traditional self-piercing screws: Zip-In’s tapered point with a single tip thread delivers immediate penetration, while the second thread ensures rapid, secure engagement after entry. The heat-treated point maintains strength under repeated driving, letting you fasten thicker or layered sheets without sacrificing performance or increasing the risk of thread stripping.
Technical snapshot:
- 6 x 3/8 inch
- Drive:1/4″ slotted hex washer head
- Finish:Zinc plated
- Count:1000 per package
- Application:Self-piercing sheet metal fastening
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