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Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 347
1401. SCREW THREADS, Trape-zoidal thread. Angle 90° face, 450 back.Depth equals 0.75 of the pitch. 33S MILL AND FACTORY APPLIANCES. … ■ POWELLS I*—pHTHREADMechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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