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2. Self-tapping screw - Wikipedia

   en.wikipedia.org/wiki/Self-tapping_screw

   A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws .

3. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   A 5-point can drill through 0.5 in (12.7 mm) of steel, for example. self-tapping machine screw: A self-tapping machine screw is similar to a machine screw, except the lower part of the shank is designed to cut threads as the screw is driven into an untapped hole.

4. Robertson screw - Wikipedia

   en.wikipedia.org/wiki/Robertson_screw

   Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...

5. Fastener - Wikipedia

   en.wikipedia.org/wiki/Fastener

   The major grade used in stainless steel fasteners: 200 series, 300 series, and 400 series. Titanium, aluminium, and various alloys are also common materials of construction for metal fasteners. In many cases, special coatings or plating may be applied to metal fasteners to improve their performance characteristics by, for example, enhancing ...

6. 'Shocking and unconscionable': Joe Biden mourns victims of ...

   www.aol.com/news/shocking-unconscionable-joe...

   WASHINGTON – President Joe Biden offered his condolences Monday to the victims of a school shooting in Wisconsin and urged Congress to pass tougher gun-control laws. “Today, families in ...

7. Judge to decide whether Trump's hush money conviction can stand

   www.aol.com/news/judge-decide-whether-trumps...

   A New York judge is set to decide this week whether President-elect Donald Trump's criminal conviction on charges involving hush money paid to a porn star should be overturned in light of the U.S ...