Guizhou duct manufacturer

A type of expansion screw.

When using, it is necessary to first drill holes of the corresponding size on the fixed body with an impact drill (hammer), and then insert the bolts and expansion tubes into the holes and tighten the nuts to make the bolts and expansion tubesThe pipes, installation components, and fixed bodies are tightly expanded and integrated. After tightening, the bolt that will expand has a large head bolt at the end, which is covered with a slightly larger diameter than the boltThere are several openings at the tail of the large circular pipe. When the bolts are tightened, the tail of the large end is brought into the L opening pipe, which is then enlarged to the point of expansionInflate and then fix the bolt to the ground or wall to achieve rooting.