Malco 8X1/2 Zip-in Self-Piercing Screws | 1/4" Slotted Hex Washer Head Sheet Metal Screws | Fast & Easy Piercing | Zinc Plated (1000 Count)

Malco 8X1/2 Zip-in Self-Piercing Screws | 1/4" Slotted Hex Washer Head Sheet Metal Screws | Fast & Easy Piercing | Zinc Plated (1000 Count)

• 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.
• Complete operator control with precise hole alignment.
• Combination lead double thread Instantly penetrates and engages in heavy gauge sheet metal and layered light gauge.
• Starting thread machined down to very tip of screw point.

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. A single starting thread is formed down to the very tip of the point and is the source of zip-in's penetrating power. A second thread above the point engages after initial penetration and drills in the screw double fast. Zip-in screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.