Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 269
be found in stock. Figs. 514, 515, and 516 are machine-bolts, from ^ to f diameter, and 1to 4 long, but not flanged, as in Fig. 514, unless expressly ordered ; the dot-ted line shows the radius of curvature of a finished head. The diagonal linesbeneath the head (Figs. 515 and 516) represent square…
Mechanical drawing
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