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About Tapping Screws
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Steel Phillips Drilling Screws for Joining Wood to Metal
With Cutting Wings
These screws speed installation by drilling, tapping, and fastening wood and metal in a single operation. Length is measured from the top of the head.
Screws with cutting wings drill a slightly larger hole in the wood to allow for expansion. The wings break off when they contact metal, so the screw can tap the remainder of the hole.
Corrosion-resistant-coated steel screws are a good choice for ACQ-treated (arsenic-free) lumber.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Screw Features | Drill Point Size | Drill Tip Lg. | For Metal Thick. | For Wood Thick. | Dia. | Ht. | Drive Size | Thread Size  | Threading | Pkg. Qty. | Pkg. | |
Corrosion-Resistant-Coated Steel | |||||||||||||
No. 10 | |||||||||||||
| 1 7/16" | Cutting Wings | No. 3 | 1/4" | 0.06"-0.17" | 0.25"-0.75" | 0.41" | 0.17" | No. 2 | 10-24 | Fully Threaded | 50 | 000000000 | 000000 |