page_title: Screw
section_title: Fasteners with a non-tapered shank
hierarchical_section_title: Screw / Types of screws and bolts / Fasteners with a non-tapered shank
context_page_description: A screw and a bolt are similar types of fastener typically made of metal, and characterized by a helical ridge, known as a male thread. Screws and bolts are used to fasten materials by the engagement of the screw thread with a similar female thread in the matching part.
  Screws are often self-threading where the thread cuts into the material when the screw is turned, creating an internal thread that helps pull fastened materials together and prevent pull-out. There are many screws for a variety of materials; those commonly fastened by screws include wood, sheet metal, and plastic.
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