Easy to tighten  Fastener Expertise Q & A    No. 25
No. 25: In the tight bolt connection subjected to axial variable load, a flexible bolt is used, whose main function is to reduce the stress amplitude of the bolt.
Previous Review--No. 24: The graphic board A is bolted to the board B with four reaming holes. When the force is F, the bolts 3 of the four bolts are the most stressed.
Answer analysis: correct
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