Malco® Zip-in® Screws are known for their superior quality and is considered by many for being the best screw choice for HVAC metal duct fastening. A unique thread design and quality controlled manufacture spell the Zip-in® Sheet metal screw difference. Zip-in® are made with a sophisticated heat treat process which 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® penetrating power. A second thread above the point engages after initial penetration and drills in the screw double fast. Malco® Zip-in® Screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type. For the best performance, use any Zip-in® Sheet Metal Screw with a Malco® C-RHEX™ Cleanable, Reversible Dual Sided Hex Driver.
Malco® Self-Piercing Sheet Screw, 1/4 in Head, Slotted Head, Hex Drive, Metal, Finish: Bright Zinc-Plated
| Drive Type | : | Hex |
| Finish | : | Bright Zinc-Plated |
| Head Size | : | 1/4 in |
| Head Type | : | Slotted |
| Material | : | Metal |
- Undercut-indented hex washer slotted head
- 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
- 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
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