Malco® Zip-in® HW8x1-1/2Z-250 Self-Piercing Screw, #8 Thread, 1-1/2 in OAL, Indented Hex Washer Head, 1/4 in Drive

Malco® Zip-in® Self-Piercing Screw, #8 Thread, Double Thread, 1-1/2 in Overall Length, 1/4 in Head, Indented Hex Washer Head, 1/4 in Drive, Slotted Drive, Sheet Metal, Bright Zinc-Plated

Malco® 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® 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® penetrating power. A second thread above the point engages after initial penetration and drills in the screw double fast. Malco® Zip-in® screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.

• 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
• Trademarked and patented head markings indicate one and only genuine Zip-in®
• Single starting thread machined down to very tip of screw point
• Instantly penetrates and engages in heavy-gauge sheet metal and layered light gauge
• Quality controlled heat treat
• Sharp tapered point will not mushroom or break
• No walking

Specifications