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Formula for calculating the effective diameter of metric and Unified threads using the three-point measurement method

Author: mikityanExecutions: 76804
TOP/Shared Formulas (Engineering)/Civil & Mechanical

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Formulas for Calculating the Effective Diameter of Metric and Unified Threads
E = M - 3dm + 0.866025P
M
mm
dm
mm
P
mm
Effective diameter of a screw mm
E = Effective diameter
M = Outer diameter of the screw, including the three hands
dm = Optimal diameter of the three hands
P = Screw pitch

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