Malco Zip-In HW7X1/2ZT are self-piercing sheet metal screws engineered for fast, reliable metal-to-metal assemblies. Featuring a 1/4" Slotted Hex Washer Head and a zinc-plated finish, these screws are built to endure demanding trades—from ductwork and flashing to metal enclosures—delivering strong, clean joints with fewer steps. Each 1,000‑count box is ready for large projects, helping you stay productive on the job site.

• Advanced thread design and heat-treated point — a precise heat treatment tapers to a fine, sharp point without sacrificing strength, enabling confident starts and dependable penetration through metal.
• Double-thread, single-start to tip — the first thread forms entry right to the tip, while a second thread above the point engages after initial penetration, driving the screw double-fast and reducing torque drift.
• Fastening heavier gauge sheet metal — designed to outperform standard self-piercing screws by delivering greater penetration power and holding capacity on thicker or tougher metals.
• Corrosion-resistant zinc plating — a durable finish that helps protect joints in indoor and outdoor environments, extending the life of your assemblies.
• Secure seating with a 1/4" Slotted Hex Washer Head — provides a robust drive and a clean, flush finish with a built-in washer to seal and distribute load evenly.

How Zip-In Works

The Zip-In design starts with a finely tapered point that cuts into sheet metal with minimal wandering. The single starting thread forms entry all the way to the tip, then a second thread above the point engages to cut the remaining material quickly as you drive. The result is faster penetration, fewer misstarts, and strong clamping that stays put, even when joining heavier gauges of metal.

Ideal Applications

• Attaching metal panels, flashing, ductwork, and enclosures where a rapid, secure fastening is essential
• Fabrication and installation projects that involve thicker sheet metal or demanding environments
• DIY to professional builds where reducing install time without compromising joint integrity matters

Why Choose Zip-In Over Other Self-Piercing Screws

Unlike ordinary self-piercing screws, Zip-In leverages a purpose-built thread sequence and heat-treated point to deliver immediate bite and sustained performance. The combination of a tightly engineered taper point, a two-stage threading action, and a zinc-coated finish translates to fewer passes, tighter joints, and better resistance to pull-out in real-world conditions.

Specifications & Packaging

• Model: Malco HW7X1/2ZT
• Head: 1/4" Slotted Hex Washer
• Material: Zinc-plated steel
• Thread: Self-piercing with dual-thread engagement
• Count: 1,000 screws per box