The U-shaped bolt is wrapped with a ring tube, this ring tube has a gap, and when used, a hole is made in the wall. Put the anchor bolts in this hole, and the ring tube is squeezed and stretched when the bolts are tightened. In this way, the bolt is stuck in the hole and plays a fixed role. The secondary pouring method can be used, that is, bolt holes of appropriate size are reserved when pouring the foundation.
Thread is a shape with uniform spiral line protrusions on the outer surface or inner surface of the U-bolt. According to its structural characteristics and uses, it can be divided into three categories: Ordinary thread: The tooth shape is triangular, which is used to connect or fasten parts. Ordinary threads are divided into coarse and fine threads according to the pitch, and the connection strength of fine threads is higher. Transmission thread: the tooth shape is trapezoidal, rectangular, saw-shaped and triangular. Sealing thread: used for sealing connection, mainly pipe thread, taper thread and taper pipe thread.
