Fry, Horace Pugh. [from old catalog] · Philadelphia [The John C. Winston co.] · leaf 53
Fig. 31, … Fig. 32. 51 2. Conventional threads, as shown in Fig. 32, are used forthreads of all standards. It is not necessary that the number ofdivisions should correspond with the actual number of threads.If the thread is other than the U. S. Standard, or if the number ofthreads does not correspond with the…
Mechanical drawing
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