Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 36
f one thread to the center of the next. The^^lead of a screw is the distance the screw advances inone complete turn. 20 SCREW THREADS 21 12. Single, Double, and Triple Threads.—A single-threaded screw, as shown in Fig. 18, is one which ad-vances in one complete turn a distance (measured in… … S/^Oi£ THREADFig. 18.
Mechanics, Applied
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