Abstract:There is a big difference between the current JJF 1345-2012 Calibration Specification and the old JJG 888-1995 regulation on force measurement correction. In order to determine the force measurement correction method of metric cylindrical thread plug gauges, this paper compares and analyzes the force measurement correction data of current and old versions of cylindrical thread gauge Calibration Specification / regulation on metric cylindrical thread plug gauge in three-wire method, through the verification of test data, discusses the calculation method of force measurement correction of thread plug gauges. If the force measurement of metric cylindrical thread needs to be modified, the modified formula of JJG 888-1995 is recommended, but the formula of JJF 1345-2012 is not recommended. It is recommended to use smaller force when the pitch is fine, and larger force when the pitch is coarse. It is suggested that the force should be no less than 1N and no more than 10N.