Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 71
n A7^. /32 132. The castle nut illustrated forms a good method. Lockwashers consisting of a piece of sheet metal are effective. Onecorner is turned down, and another corner is turned up, asillustrated. The following table gives the dimensions for U. S. Standardbolt heads and nuts. BOLTS AND SCREWS…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-441-292.webp)
