What are the connection methods for bolts and nuts

1. Hidden connection

Hidden connections are mainly used inside profiles to achieve a hidden and aesthetically pleasing effect.

Half round head bolts and hexagonal socket bolts are mainly used. 

Before connecting, it is necessary to punch and tap the predetermined position of the profile, and then tighten it directly with bolts.

2. Embedded connection

Embedded connection mainly involves placing bolts and nuts into the groove of the profile, and then tightening the connection. 

The commonly used bolts and nuts for embedded connections include T-bolts, T-nuts, slider nuts, elastic nuts, and spring nuts.

It can automatically position and lock during installation engineering, making the installation process simple and convenient.

3. External connection

The bolts and nuts installed on the outside of profiles or accessories can be clearly seen from the appearance. 

Commonly used bolts and nuts include flange nuts, square nuts, flat machine bolts, cylindrical head bolts, and so on. 

During the connection process, a wrench can be used to achieve the fastening effect from the outside, 

which is simple and convenient, but the appearance is not aesthetically pleasing.