Great Magtech (Xiamen) Electric Co., Ltd. is one of the leading manufacturers and suppliers of long hex socket flat head expansion anchor bolt in China. Please feel free to wholesale high quality long hex socket flat head expansion anchor bolt from our factory. If you have any enquiry about cooperation, please feel free to email us.
Applications: be widely used in fence, burglarproof doors and windows, canopy, air conditioning rack fixation, home decoration, engineering, etc.
The working principle of expansion screw: Put the expansion screw into the ground or the hole on the wall and then tighten the nuts of the expansion bolt with wrench. The bolt goes outside while the metal sheath does not move. Thus the bigger head of the bolt will expand the metal sheath, making it fill the whole hole. Now, the expansion screw can not be pulled out.
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