In using the formula for measuring an American Standard Unified Screw Thread by the three-wire method, why should the constant 0.86603 be multiplied by the pitch before subtracting from measurement M, even if not enclosed by parentheses? E=M+0.86603P+3W ?

In using the formula for measuring an American Standard Unified Screw Thread by the three-wire method, why should the constant 0.86603 be multiplied by the pitch before subtracting from measurement M, even if not enclosed by parentheses? E=M+0.86603P+3W ?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter6: Fasteners

Section: Chapter Questions

Problem 12RQ

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Question

In using the formula for measuring an American Standard Unified Screw Thread by the three-wire method, why should the constant 0.86603 be multiplied by
the pitch before subtracting from measurement M, even if not enclosed by parentheses? E=M+0.86603P+3W ?

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