Malco Zip-In Sheet Metal Screw, Self-Piercing, #7 Thread, 3 in Overall Length, Hex Washer Head, Slotted Drive, Zinc Plated, Tapered Sharp Point, 1/4 in Head, Double Thread, 1/2 in Thread Length
- Undercut - indented hex washer slotted head
- Bright zinc plated
- Burr free
- 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
- 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
Standards/Approvals: US Patent No. D524/638
Warranty: Limited Lifetime
Warranty: Limited Lifetime
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