螺纹是机械工业广泛应用的机械零件,它的制造精度直接影响着机件连接的可靠性装配精度和互换性。特别是在航空航天飞行设计制造中大量采用螺纹连接,大约有50%以上的零件间的连接要靠螺纹配合来实现,连接质量决定了飞行器等工业产品的可靠性和寿命。从国外的发展现状看内螺纹的测量正逐步向量化方向发展。美国NISC重新修定了军用标准要求,除公称直径D≤0.19 in(4.826 mm)的内螺纹允许继续使用螺纹极限量规检验外,对其他直径的螺纹的所有参数必须进行量化检验。文章主要分析了螺纹塞规的几种基本测量方法,分别对其原理和操作方法做了简单的总结。 Thread is widely used in the mechanical industry machinery parts, its manufacturing accuracy directly affects the reliability of the mechanical assembly assembly accuracy and interchangeability. Especially in the design and manufacture of aerospace flight extensive use of threaded connections, about 50% of the parts connected by threads to achieve, the quality of the connection determines the reliability of aircraft and other industrial products and life expectancy. The current situation in foreign countries to see the internal thread measurement is gradually quantified direction. The NISC of the United States has re-established military standards requiring that all parameters of threads of other diameters have to be quantitatively checked, except for internal threads of nominal diameter D ≤ 0.19 in (4.826 mm) which allow the continuation of the thread limit gauge test. The paper mainly analyzes several basic methods of thread gauge, and briefly summarizes its principle and operation method.