Machine drawing; a text and problem book for technical students and draftsmen (1921)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 32
Fig. 42. Rounded Type. FASTENINGS FOR MACHINERY 21 … Fig. 43. Bolt and Nut Chart. 22 MACHINE DRAWING The distance across flats and thickness of bolt head is the same as for thehex form. Note the radii of the arcs, the 30° chamfer angle, and the45° angle in the diagram.
Machinery
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