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HW7X1/2ZG 7 X 1/2 Zip-in Self Piercing Sheet Metal Screws HH 100CT

SKU 5346206
Original price $3.57 - Original price $3.57
Original price
$3.57 - $3.57
Current price $3.57

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.

For the best performance, use any Zip-in® Sheet Metal Screw with a Malco C-RHEX™ Cleanable, Reversible Dual Sided Hex Driver.


  • Undercut-indented hex washer slotted head
  • Bright Zinc Plated
  • Burr Free
  • Full 1/4″ (no. 8) head will not strip out of hex driver opening
  • One 1/4″ hex driver accommodates all sizes
  • Undercut – always seats flush
  • Some screws sizes available in pails.
  • ® Trademarked & Patented Head Markings indicate one and only genuine Zip-ins. U.S. Patent No. D524,638

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 # Description Head size Package Size Available
HW7x1/2Z Zip-in 1/4 in. Bags, Tubs, Bulks, Pails
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