Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 379
the helical groove. A cylinderhaving a thread on it is called a screw, and a ])iece having a cyl-indrical hole in it, with a thread around the hole, is called a nut.The groove which is cut to form the thread may be in the form ofa single, double or triple helix, and either right-hand or… … Fig. 29. One complete turn of a screw causes it to travel through inut a distance equal to its pitch.
Mechanical engineering -- Dictionaries
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