Easy to tighten  Fastener Expertise Q & A    No. 18
No. 18: When the bolted joint is a forging or casting, the mounting bolt should be machined into a small boss or counterbore (sunk head, fish eye pit) for the purpose of ______.
A. Easy to tighten B. Avoid eccentric load
C. Increase the contact surface and improve the carrying capacity. D. Good appearance.
Previous Review - Issue 17: The illustration shows a flexible bolt used in a tight bolt connection subject to axially variable loads, the main function of which is ______.
A. Reduce the weight of the joint B. Reduce the bolt stiffness and reduce the stress amplitude
C. It is convenient to assemble and disassemble the bolts. D. Increase the tightness of the joints.
Answer analysis:
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