Wallis, Rolland S. [from old catalog], Iowa state college of agriculture and mechanic arts, Ames. Dept. of engineering extension. [from old catalog] · Ames, Iowa, Engineering extension department, Iowa state college · leaf 55
inary V-thread being drawn as in Fig. 71a. As the drawing of individual threads takes too much time, threadsare usually indicated on working drawings by some one of the variousconventional methods shown in Fig. 71. Where the lines representingthe edges of threads are drawn perpendicular to the… … Fig. 71.—Conventional representation of threads.
Mechanical drawing
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