ISO Metric Screw Thread
The ISO metric screw threads are the world-wide most commonly used type of general-purpose screw thread. They were one of the first international standards agreed when the International Organization for Standardization was set up in 1947.
Read more about ISO Metric Screw Thread: Basic Profile, Designation, Preferred Sizes
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—William Shakespeare (1564–1616)
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—John Gregory Brown (20th century)