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 69
r/g. /^/ … r/g. /e3 D / s 16 S e 7/6 /2 9/6 e 34 7 e J H 7 /6 916 5& 3 /6 7 e / Is /i 5 3 e /6 /2 9/6 S e // /6 4 7 8 li li method is to put a boss on the casting opposite the hole, andthen use a regular drill and plug tap (Fig. 119). Machine Screws. — Small screws are made with a variety offorms of…
Mechanical drawing
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