When the bolt is tightened, it will expand. There is a big head at the tail of the bolt, and a circular tube with a slightly larger diameter is sleeved outside the bolt. There are several openings in the tail. When tightening the bolt, take the tail of the big head into the open pipe, punch the pipe to achieve the purpose of expansion, and then fix the bolt on the ground or wall to achieve the purpose of rooting.
Extended data
superiority
1, with wide applicability. As long as the thread size of the male thread part is consistent, it is suitable for any type of anchor head. ?
2. Selection of construction methods. Fixed-point presetting can be used as required, and drilling (loading) can also be carried out once, and its function and effect are completely consistent.
3. The construction success rate is high. There is no trouble of hole attachment depth and borehole inclination, and the construction achievement rate is 100%.
4. High-pitched design. Design of special hook for full-tooth taper expansion.
5. Locking and locking effect. Full-tooth taper expansion special design, using reverse thrust effect to lock the workpiece urgently.
6. Improve design thinking. Short and pithy, suitable for all commercially available screws, DIY and the most ideal building accessories for fortifications.
7. Ensure that the anchor bolt expands. Metal plate pressed products, patented full-tooth taper expansion design, strong grasping ability, no idling, no need for professional construction skills. ?
8. Disposal is not troublesome. As long as the anchor bolt workpiece is pulled out and the plane is repaired with filler, there is no trouble of disassembly and no danger of bump.
Baidu encyclopedia-expansion screw
Baidu encyclopedia-expansion bolt