Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 254
a distance beyond the screwed part equal to the pitch. Screw-thread Conventions.—The method of drawingscrews to represent their true form is shown in Fig. 315,but it is quite obvious that it is unnecessary for the drafts-man to perform this lengthy geometrical construction toindicate each screwed…
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