我厂2~#机中联门有24个M76的地脚螺栓,安装时将螺栓和螺母旋合后,觉得内、外螺纹的配合比较松,于是就提出对螺纹配合是否合格进行检查。据资料介绍,螺纹检查可用螺纹塞、环规或螺纹千分尺等专用量具测量,可现场没有,迫使我们寻找一种新的测量方法。由图1可见当内、外螺纹构成配合后,在大径和小径间存在较大的间隙,所以认为大、小径不参于配合,螺纹配合性质主要取决于中径尺寸。 I plant 2 ~ # 24 in the United Gate M76 anchor bolt, the installation of the bolt and nut after screwing, that the internal and external thread with loose, so it proposed whether the thread with the eligibility check. According to the introduction of information, thread check available thread plugs, ring gauge or thread micrometer and other special measuring tools, but the scene did not force us to find a new measurement method. Can be seen from Figure 1 When the internal and external threads form a fit, there is a large gap between the large diameter and small diameter, so that the large and small diameter does not participate in the fit, the nature of the thread fit mainly depends on the diameter size.