Easy to tighten  Fastener Expertise Q & A    No. 31
The efficiency when tightening the nut is mainly related to the ______ of the thread.
A. Ascending angle B. Number of lines C. Angle of elevation and profile angle D. Pitch and tooth angle
Previous Review - Issue 30
The purpose of connecting the bolt set of the cylinder end cap from Figure a to Figure b is ___________.
A. Improve fatigue resistance B. Save bolts C. Easy to install D. Easy to disassemble
Answer analysis: bolt group connection method of cylinder end cover b): improve fatigue strength
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