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- 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 gas of sheet metal than any other self-piercing type.
- Undercut - indented hex washer slotted head
- Bright zinc plated
- Burr free
- Full 1/4 in (# 8) head will not strip out of hex driver opening at anytime during operation
- One 1/4 in hex driver accommodates all sizes
- 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
- Drive TypeSlottedFinishZinc PlatedOverall Length3 inPoint TypeTapered SharpDiameter-Thread Size#8Head Size1/4 inHead TypeHex WasherManufacturerMalco ProductsManufacturer #HW8X1/2ZGThread Length1/2 inThread TypeDoubleTypeSelf-Piercing