Easy to tighten  Fastener Expertise Q & A    No. 20
No. 20: As shown in the figure, the elastic element is placed under the nut for the purpose of ______.
A. Reduce the bolt stiffness and reduce the stress amplitude under variable load
B. Make the threads of the ring in the nut more evenly stressed.
C. Prevent the nut from falling back
D. Reduce the rigidity of the coupled member and improve the tightness of the joint.
Review of the previous issue - No. 19: Bolt group connection subject to reverse (overturning) moment, the arrangement of bolts should be ______.
D. None of the above three options are available
Answer analysis:
Pocket Scale,Digital Pocket Scale,Jewelry Pocket Scale,Electronic Pocket Scale
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