What is the least number of threads that must be engaged


A SAE grade 5, UNF bolt carries a static tensile load of 2000 lb with a safety factor of 5 based on proof strength. The bolt is used with a nut made of steel of SAE grade 1 specifications.

(a) What size of bolt is required?

(b) What is the least number of threads that must be engaged for the thread shear strength to be equal to the bolt tensile strength?

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Mechanical Engineering: What is the least number of threads that must be engaged
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