Malco Zip-In Self-Piercing Screws | 5/16" Slotted Hex Washer Head Sheet Metal Screws | Type A Single Thread | Zinc Plated (40, #10 x 2")

Malco Zip-In Self-Piercing Screws (HW10X2G) are engineered for fast, clean fastening into sheet metal. These drill-in screws—Type A with a single thread—pierce the material and thread securely in one smooth motion, reducing installation steps and downtime on the job.

Key features designed for reliable metalwork:

• Diameter and head: 5/16" slotted hex washer head for a strong, wide bearing surface that helps seal joints and resist pull-out.
• Drive and compatibility: Slotted drive paired with a hex washer head for compatibility with common power drills or drivers in tight spaces.
• Thread design: Type A single thread delivers fast, controlled penetration in thin to medium gauge sheet metal.
• Finish: Zinc plating provides corrosion resistance for durability in exposed or semi-exposed metal assemblies.
• Size and packaging: #10 screw, 2 inches long, packaged as shown (40 pieces per package).

Where this screw excels: HVAC duct installations, metal roofing and siding projects, electrical enclosures, appliance housings, metal cabinets, and any thin-gabric sheet-metal assembly where speed matters. The Zip-In design minimizes pre-drilling and speeds up work without sacrificing holding power, making it a practical choice for professional installers and DIYers alike.

Why choose Malco Zip-In over other sheet-metal screws? The combination of a self-piercing tip, a robust 5/16" hex washer head, and a Type A single-thread profile means you get quick starts, steady driving performance, and dependable grip in a single operation. The zinc finish helps protect against corrosion in everyday environments, so joints stay tight longer.

Practical tips for best results:

• Let the self-piercing tip do the work—avoid forcing the screw through metal that’s thicker than intended for this design.
• Use a drill/driver with appropriate torque settings to prevent over-tightening and potential material deformation.
• When joining multiple panels, start at an edge or corner for alignment and then work along the seam for a flush finish.

Available in longer lengths and larger pack sizes to fit a range of metal thicknesses and project scales, so you can stock up for larger jobs or ongoing workloads while maintaining consistent performance.