What are the advantages of hexagonal bolts?

External hexagonal bolts/screws: good self-pinching properties; large preload contact area and large preload force; full thread length range is wider; reamed holes can exist, which can fix the position of parts and withstand shear caused by lateral forces; head The inner hexagon is thinner than the inner hexagon, and in some places the inner hexagon cannot be replaced.

Hexagon socket bolts/screws: easy to fasten; not easy to disassemble; not easy to slip; occupy small space; bear large load; can be countersunk, can sink into the workpiece, are more delicate and beautiful, and will not hinder other components.

External hexagonal bolts/screws: occupy a large space and are not suitable for more delicate occasions; they cannot be used for countersunk heads.

Hexagon socket bolts/screws: small contact area, small pre-tightening force; no full threads beyond a certain length; fastening tools are not easy to match, easy to slip when tightened, and replacement is inconvenient; a professional wrench must be used when disassembling, and it is difficult to disassemble at ordinary times .