They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

A special thread form keeps bolts and nuts tight under vibration by attacking the problem from a different angle. Two conventional methods for securing threaded fasteners against preload loss include ...

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Adams bolt threading machines, Cook nut tapping machines, open side iron planers, and horizontal drilling, boring, and milling machines. Open side planers ; extension planers ; plate planers ; bolt ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...