Screw
Define thread. 2. List four purposes of threads. THREAD TERMINOLOGY. 3. Define pitch diameter, pitch, lead, root, and crest. 4. How is the pitch designated for: a. UNC threads? b. Metric threads? 5. Why is the diameter of the blank for a rolled thread equal to the pitch diameter? 6. How may a right-hand thread be distinguished from a left-hand ... ................
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