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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The term fine adjustment screw typically refers to screws with threads from 40–100 TPI (Threads Per Inch) (0.5 mm to 0.2 mm pitch) and ultra fine adjustment screw has been used to refer to 100–254 TPI (0.2 mm to 0.1 mm pitch). These screws are most frequently used in applications where the screw is used to control fine motion of an object.

3. Unified Thread Standard - Wikipedia

   en.wikipedia.org/wiki/Unified_Thread_Standard

   The number series of machine screws has been extended downward to include #00-90 (0.047 in = 0.060 in − 0.013 in) and #000-120 (0.034 in = 0.060 in − 2 × 0.013 in) screws; [3] however, the main standard for screws smaller than #0 is ANSI/ASME standard B1.10 Unified Miniature Screw Threads. This defines a series of metric screws named after ...

4. Robertson screw - Wikipedia

   en.wikipedia.org/wiki/Robertson_screw

   The internal-drive square socket for screws (as well as the corresponding triangular socket drive) had been conceived several decades before the invention of the Robertson screw and driver. An earlier patent covering both square-socket- and triangle-socket -drive wood screws, U.S. patent 161,390 , was issued to Allan Cummings of New York City ...

5. ISO 898 - Wikipedia

   en.wikipedia.org/wiki/ISO_898

   Part 1 defines the mechanical properties of bolts, screws, and studs.It specifically applies to fasteners that have an ISO metric screw thread as defined in ISO 68-1.The properties are defined for M1.6-39 with coarse threads and M8-39 with fine threads.

6. Category:Screws - Wikipedia

   en.wikipedia.org/wiki/Category:Screws

   This page was last edited on 25 December 2020, at 06:49 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for Sunday ...

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   The knit jacket that shoppers say is better than 'JCrew cardigans' is on sale for $34. See all deals. In Other News. Entertainment. Entertainment. People.