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2. Self-tapping screw - Wikipedia

   en.wikipedia.org/wiki/Self-tapping_screw

   Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping 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. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   A machine screw or bolt is usually a smaller fastener (less than 1 ⁄ 4 inch (6.35 mm) in diameter) threaded the entire length of its shank that usually has a recessed drive type (slotted, Phillips, etc.), usually intended to screw into a pre-formed thread, either a nut or a threaded (tapped) hole, unlike a wood or self-tapping screw. Machine ...

5. Altenloh, Brinck & Co - Wikipedia

   en.wikipedia.org/wiki/Altenloh,_Brinck_&_Co

   In 1912–3, a branch plant was established in Gevelsberg, Westphalia (Plant II); from 1915, the production of cold-formed wood and machine screws started there. Here, the non-cutting process of thread rolling was also used for the first time. In 1923, a forge was added to the plant for the production of bolts and nuts by hot working. [8]

6. Screw mechanism - Wikipedia

   en.wikipedia.org/wiki/Screw_mechanism

   When the handle is pushed down, the shaft slides into pawls in the tubular stem, turning the bit. Most screws are "self locking" and axial force on the shaft will not turn the screw. This self-locking property is one reason for the very large use of the screw in threaded fasteners such as wood screws, sheet metal screws, studs and bolts ...

7. 5 cancer types where screenings save the most lives - AOL

   www.aol.com/5-cancer-types-where-screenings...

   A total of 5.94 million deaths were prevented for those five disease types, according to an NCI press release. Eighty percent of those averted deaths were attributed to screening and prevention.