Thread Standards
There are many systems for specifying the dimensions of screws, but in much of the world the ISO metric screw thread preferred series has displaced the many older systems. Other relatively common systems include the British Standard Whitworth, BA system (British Association), and the Unified Thread Standard.
Read more about this topic: Screw
Famous quotes containing the words thread and/or standards:
“Tom Hyde, the tinker, standing on the gallows, was asked if he had anything to say. “Tell the tailors,” said he, “to remember to make a knot in their thread before they take the first stitch.” His companion’s prayer is forgotten.”
—Henry David Thoreau (1817–1862)
“Men are rewarded for learning the practice of violence in virtually any sphere of activity by money, admiration, recognition, respect, and the genuflection of others honoring their sacred and proven masculinity. In male culture, police are heroic and so are outlaws; males who enforce standards are heroic and so are those who violate them.”
—Andrea Dworkin (b. 1946)