Collins, Charles Dickey, 1872- [from old catalog] · New York, D. Van Nostrand company · leaf 117
I 1 I p = j:)itch= — Formula { No. threads per inch d = depth = pX.80003 Whitworth Standard Thread K^-s.—P----H … 1 J) = pitch =■ Formula -! No. threads per inch(i = depth = pX. 04033b = radius = J) X. 1373 Acme Standard Screw Thread
Drawing-room practice · Mechanical drawing
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