Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.4 times
0.6 times
0.8 times
0.7 times

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Machine Design
The face of the tooth is the

Width of the tooth measured along the pitch circle
Surface of the top of the tooth
Surface of the tooth above the pitch surface
Surface of the tooth below the pitch surface

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