Wood, Deck & Sheet Metal Screws

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Expected delivery: Wed, Nov 18

This section covers screws that form their own threads in wood, sheet metal and similar materials. You will find wood screws, coated deck screws, lag screws, drywall screws, self-tapping sheet metal screws, self-drilling (drill point) screws for steel framing and panels, and roofing screws with bonded sealing washers. Head styles include flat, pan, truss, hex washer and modified truss, with Phillips, square and six-lobe drives.

What to check before you order

  • Base material. Self-tapping screws need a pilot hole. Self-drilling screws have a drill tip, and the tip number tells you how thick a steel section it can drill through. Check the maker's rating for your gauge.
  • Coating for outdoor work. Treated lumber is corrosive to plain steel. Use stainless or screws coated and rated for treated wood.
  • Length. For wood, choose a screw long enough to pass through the top piece and get solid thread bite in the piece below.
  • Lag screws. Drill a pilot hole sized for the wood species, and use a washer under the head.
  • Drive. Square and six-lobe drives work well with impact drivers on long runs.

Common questions

Can I use drywall screws for framing or decks?

No. Drywall screws are hardened and brittle, and they can snap under shear loads. Use structural or deck screws made for that job.

See more fasteners, washers, and power tool bits and accessories.

Wood, Deck & Sheet Metal Screws: page 7

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