Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 211
Fig. 338. . The screw thread is formed with straight lines atan angle of 60° to each other. The top and bottomof the thread are flattened, each to a width of ^^thof the pitch, Fig. 343. For small diameters of bolts the amount of flat-tening is not made to any particular measure, and in drawing… … Fig. 339. In a square-threaded screw of U. S. Standardform, the width of the thread is equal to the widthof the groove—each equal to one-half the pitch, Fig- 344- The depth of the thread is also equal to one-halfof the pitch—that is, equal to the width of the groove. ROGERS DRAWING AND DESIGN. 235…
Mechanical drawing · Machine design
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