Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 259
Fig. 285. Square Thread. Edges Drawn as Helices For small sizes, the method shown in Fig. 287 is generallyused because of its simplicity. The Acme screw thread is rep-resented conventionally as shown in Fig. 288. It is convenientin drawing to make the angle between the faces of the thread30°… … Fig. 286. Square Thread. Conventional Representation for Large Sizes
Mechanical drawing
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