Section 509 of the Standard Specifications is hereby ...

THREAD CALCULATIONS. 15. For an M 20 x 2.5 thread, calculate: A. Pitch d. Width of crest. B. Depth e. Width of root. C. Minor diameter. 16. Sketch a UNC thread and show the dimensions of the parts. 17. How does a Brown and Sharpe worm thread differ from an Acme thread? 18. For a 1 in.—8 NC thread, calculate: A. Minor diameter b.Width of ... ................
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