That portion of the incomplete thread that is not fully formed at root or at crest and root, and is produced by the chamfer at the starting end of the thread forming tool.
A) Vanish thread
B) partial thread
C) washout thread
D) thread runout
E) all of the above

Question

Quizplus · Accepted Answer

All of the choices are correct. Vanish thread, partial thread, washout thread, and thread runout are all terms used to describe the portion of the incomplete thread that is not fully formed at root or at crest and root, and is produced by the chamfer at the starting end of the thread forming tool.

That Portion of the Incomplete Thread That Is Not Fully