Malco® Zip-In® HW7X1/2ZT Self-Piercing Sheet Metal Screw, #7, Hex Washer Head, Slotted Drive, Zinc Plated

  • Country of Origin: JP
  • Diameter - Thread Size: #7
  • Drive Type: Slotted
  • Head Size: 1/4 in
  • Head Type: Hex Washer
  • Manufacturer Name: Malco Products
  • Measurement System: Imperial
  • Thread Length: 1/2 in
  • Thread Type: Double
  • Features and More


  • Undercut - indented hex washer slotted head
  • Bright zinc plated
  • 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
  • Some screws sizes available in pails
  • Trademarked and patented head markings indicate one and only genuine zip-ins
  • 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


  • US Patent No. D524/638


  • Limited Lifetime