____ is the bottom of external and the top of internal threads.
A) Root
B) Clevis
C) Keyseat
D) Pitch
E) none of the above

Question

Quizplus · Accepted Answer

The root is the bottom of external threads and the top of internal threads. This is the point where the thread profile transitions smoothly from thread to non-thread. Clevis refers to a type of fastener, keyseat is a type of groove or slot, and pitch is the distance between adjacent threads. Therefore, the correct answer is A) Root.

____ Is the Bottom of External and the Top of Internal