Metric systemThread plug gaugeThere are two types of detection methods for multi parameter elements: comprehensive testing and single item testing.
Comprehensive inspection is the process of testing the comprehensive results of geometric parameter deviations that affect thread interchangeability using a gauge.

This includes: using the common metric systemThread plug gaugeInspect the working diameter (including base diameter) and single diameter of the tested thread separately with the stop gauge; Use a smooth limit gauge to inspect the actual top diameter of the measured thread.
Thread gaugeAlso known asThread plug gauge.Thread gaugeSimulate the maximum solid tooth profile of the tested thread using a caliper, verify whether the effective pitch diameter of the tested thread exceeds the pitch diameter of its maximum solid tooth profile, and simultaneously check whether the actual size of the base diameter exceeds its maximum solid size.
Inspection method: If the tested thread can be screwed through with the thread gauge and not completely screwed through with the thread stop gauge (the thread stop gauge only allows two sections of the tested thread to be screwed in, and the amount of screwing should not exceed two pitches), it indicates that the effective pitch diameter of the tested thread does not exceed the pitch diameter of its largest solid tooth shape, and a single pitch diameter does not exceed the pitch diameter of its smallest solid tooth shape. Therefore, the screw fit and connection strength can be guaranteed, and the pitch diameter of the tested thread is qualified. Otherwise, it is not qualified.