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, 2 in Thread Length, Sheet Metal, Zinc

• Undercut indented hex washer slotted head
• Burr-free
• Full 1/4 in (No 8) head will not strip out of hex driver opening
• One 1/4 in hex driver accommodates all sizes
• Undercut - always seats flush
• Combination lead double thread design
• Single starting thread machined down to very tip of screw point
• Instantly penetrates and engages in heavy gauge sheet metal and layered light gauge
• Consistent hard point
• Quality controlled heat treat
• Sharp tapered point will not mushroom or break
• No walking

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/Malco_HW7X1_2Z_Catalog.pdf
• Video Link https://youtu.be/qoDy2gVFTfk
• Warranty Information https://assets.unilogcorp.com/267/ITEM/DOC/Malco_18F_Warranty_Information.pdf