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This standard specifies the detection method for cylindrical thread parameters (pitch、 lead、 flank angle、 major diameter、 pitch diameter、 minor diameter、 pitch diameter valve column roundness、 pitch diameter cylinder taper、 tooth base arc radius、 top diameter relative pitch diameter runout). This standard is applicable to the detection of cylindrical media pattern parameters. The following normative references are essential for the application of this document. For dated references、 only the dated version applies to this document. For undated references、 the new version (including all modification orders) applies to this document. GB/T 3934 General Thread Gauges Technical Conditions GB/T 8124 Trapezoidal Thread Gauges Technical Conditions GB/T 1092255 * Non sealing Pipe Thread Gauges GB/T14791 Thread Terminology JB/T 10865 Unified Thread Gauges JF 1001 General Measurement Terminology and Definitions JJF 1059 Evaluation and Representation of Measurement Uncertainty 3 Terms and Definitions、 as defined by GB/T 14791、 JJF 1001 and JJF 1059、 as well as the following terms and definitions、 are applicable to this document. 3.1 Thread inspection test on screw threads is a set of operations to determine whether the screw T product meets the corresponding standard requirements. Note: These operations typically include measurement of thread parameters * values and/or verification of whether they exceed allowable * limits. 4 Inspection conditions 4.1 Standard reference conditions Standard reference temperature: te-20 ℃; Standard reference force measurement: F- The requirements for measuring temperature conditions、 environmental temperature、 and temperature difference between the measured part and the measuring instrument should comply with the provisions of Table 1
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