Malco's Zip-in® screws are known for their superior quality and is considered by many for being the best screw choice for HVAC metal duct fastening. A unique thread design and quality controlled manufacture spell the Zip-in® sheet metal screw difference. Zip-in's® are made with a sophisticated heat treat process which 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. Malco's Zip-in® screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.
Malco® Zip-in® Self-Piercing Screw, #8 Thread, Double Thread, 1/4 in Head, Hex Washer Head, 1/4 in Drive, Slotted Hex Drive, 3/4 in Thread Length, Sheet Metal, Zinc
Thread Type | : | Double |
Head Size | : | 1/4 in |