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Description
A unique thread design and quality controlled manufacture spell the Zip-In difference. Zip-In`s sophisticated heat treat process 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. Zip-In screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.

Features:
  • Length: 1/2"
  • Number: 7
  • Head Size: 1/4"
  • Quantity: 1,000
  • Undercut-indented hex washer slotted head
  • Bright Zinc Plated
  • Burr Fee
  • Full 1/4" (no 7) head will not strip out of hex driver opening
  • One 1/4" 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
  • Complete operator control - precise hole alignment
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Specs
Type:
Screw
Length (Inches):
1/2"
Size:
1/4"
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