What is a Screw? What are the Types of Screws?

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What is a Screw? What are the Types of Screws?
What is a Screw? A screw and a bolt are
identical types of fasteners generally made of
metal, and described by a helical ridge, also
known as a male thread (external thread). Screws
and bolts are used to fasten materials by the
engagement of the screw thread with an identical
female thread (internal thread) in the matching
part. Screws are usually self-threading also
known as self tapping where the thread cuts into
the material when the screw is turned, creating
an internal thread that helps pull fasten
materials together and prevent pull out. There
are many screws for a variety of materials
commonly fastened by screws including wood, sheet
metal, and plastic.
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• Types Of Screws -
• -) Wood Screws
• -) Machine Screws
• -) Hex Cap Screws
• -) Lag Screw
• -) Socket Screws
• -) Drywall Screws
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