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Wood screws have large threads for use in wood.
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Type 17 screws have an auger point. Countersinking nibs aid in material removal. Flat heads are countersunk (cone shaped under the head) with a flat top. Square drive is designed to reduce the risk of cam-out (stripping) and allow single-handed installation.
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.
Screws for wood to wood fastening applications such as decks, docks, and ledgers, etc.