Features:

1. Multi-sided fastening: hexagonal shape is easy to use tools to tighten and disassemble, easy to operate and can apply large torque.

2. Stable connection: The design of the internal and external teeth can realize the firm connection between different parts and has a good carrying capacity.

3. Good sealing: reasonable thread design and fastening method can provide a certain degree of sealing effect to prevent liquid or gas leakage.

4. Strong versatility: standardized size and specifications, easy to use with other standard threaded parts.