What is a flange nut

Flange nuts, also known as padded nuts, serrated nuts, hexagonal flange nuts, flange nuts, etc. Most of them are used for pipeline connections or workpieces that require additional nut contact surfaces.
Flange nut is a type of nut with a wide flange at one end that can serve as an integral washer. This is used to distribute the pressure of the nut on the fixed component, thereby reducing the possibility of component damage and making it less likely to loosen due to uneven tightening surfaces. These nuts are mostly hexagonal in shape and made of hardened steel, usually coated with zinc on the surface.
In many cases, the flange is fixed and rotates with the nut. The flange can be serrated to provide locking effect. The serrations are angled so that the nut does not rotate in the direction of loosening the nut. Due to serrations, they cannot be used with washers or on scratched surfaces. Sawtooth helps prevent the vibration of the nut from moving the fastener, thereby maintaining the retention force of the nut.
Flange nuts are sometimes equipped with rotating flanges to help form a more stable structure without affecting the finished product like serrated flange nuts. Rotating flange nuts are mainly used to connect wood and plastic. Sometimes both sides of the nut are serrated, allowing either side to lock.
The self aligning nut has a convex spherical flange that fits with a concave dishwasher to allow the nut to tighten on a surface that is not perpendicular to the nut.