用于中、小型设备安装的膨胀螺栓规格有M8、M10、M12、M14、M16等,长度不尽相同,一般根据需要购买,其使用方法有直接压紧、借助压板压紧等形式。图1为国产膨胀螺栓,图2为日本产膨胀螺栓,图3为改进的膨胀螺栓。从三个图的对比中,可看出各自的优缺点,现将改进的膨胀螺栓特点介绍如下: 1.螺杆长度可根据设备的稳固要求,加长埋深, M8, M10, M12, M14, M16, etc. for expansion bolts used for installation of medium and small equipment are not the same in length and are generally purchased according to need. The use method of the expansion bolt is directly pressed and pressed by a pressure plate. Figure 1 for domestic expansion bolts, Figure 2 Japan-made expansion bolts, Figure 3 is an improved expansion bolts. From the comparison of the three figures, we can see the advantages and disadvantages of each, the characteristics of the expansion bolts are introduced as follows: 1. The length of the screw can be extended according to the requirements of the equipment,