4.8 grade primary color hex nuts

The hexagonal nut is used with screws, bolts, and screws to connect and fasten the parts.

Ordinary hexagon nuts are widely used, characterized by relatively large tightening forces, the disadvantage is that there is enough operating space during installation, and live wrenches, open wrenches or glasses wrenches can be used during installation, and the above wrenches require a lot of operating space.

Ordinary Allen nuts are the most versatile and one of the most common fasteners in general.