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.
Malco® Self-Piercing Screw, #8 Thread, 3 in Overall Length, Indented Hex Washer Head, 1/4 in Drive, Slotted Drive, Self-Piercing Point, 1/2 in Thread Length, Steel, Finish: Bright Zinc-Plated
| Point Type | Self-Piercing |
| Thread Length | 1/2 in |
| Thread Size | #8 |
| Overall Length | 3 in |
| Head Type | Indented Hex Washer |
| Drive Size | 1/4 in |
| Drive Type | Slotted |
| Material | Steel |
| Finish | Bright Zinc-Plated |
- Head will not strip out of hex driver opening
- Undercut - always seats flush
- Burr-free
- Patented head markings U.S. patent number D524638
- Sharp tapered point will not walk, mushroom or break
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