awn at right angles to theaxis of the bolt should pass through the point of a thread onone side, and the centre of a space on the other. Always give that view of a square, hexagonal, or octagonalbolt-head, or nut which shows the distance between its paral-lel sides. In placing the dimensions upon a… … L ^■^^mm\ ^ i il ii i i11 11 1 1 i \ 1 O O Fig. 90 WORKING DRAWINGS. 125 In mating a sectional view on a line passing lengthwisethrough the centre of a shaft, bolt, or screw, it is generallyunnecessary to represent the shaft, bolt, or screw in section, asthe view is more clearly shown by leaving…
Mechanical drawing
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