K-nuts, also known as K-caps or flower tooth nuts, are nuts with a special structure whose main function is to lock and prevent loosening. K-nuts are characterised by a movable flower tooth piece pressed into one end of the hexagonal nut by means of a stamping process.

During the locking process, the elasticity of the floral teeth and the anti-slip teeth of the floral teeth are used to achieve the purpose of locking and anti-loosening. K-type axial precision locking nuts achieve the fastening of the workpiece through the free friction locking principle. When the nut rotates, friction is generated between the threads and the workpiece, which results in radial force between the threads and thus achieves the fixing effect.

• Appearance shape: The appearance of K-nuts is K-shaped, that is, when viewed from the side, its outline shows the shape of the letter K, hence its name.
• Internal thread: K-nuts are threaded internally for use with screws or bolts.
• Two openings: K-nuts have two openings, usually in the shape of a semicircle, which makes it easy to clamp or release the bolt or screw.

• Locking function: The K-nut is often used in applications where extra locking force is required. It is structurally designed so that the nut clamps onto the bolt or screw during tightening, providing additional resistance and thus reducing the risk of loosening.
• Easy installation: Because the K-nut has two openings, it is easier to install and remove versus a traditional hex nut without having to completely disengage the nut.
• Reduced Thread Wear: Since the K-nut provides additional friction, it reduces thread wear, thereby extending the life of the bolt or screw.

K-nuts have some unique features and advantages over hexagonal nuts:

• Structure and appearance: K-nuts have a K-shaped appearance and look like the letter K when viewed from the side. They usually have two semi-circular openings.
• Locking properties: K-nuts are designed to provide additional locking force. Their special structure allows them to clamp more tightly to the bolt or screw, reducing the risk of loosening.
• Installation and removal: K-nuts have two openings, which makes them easier to install and remove than hexagonal nuts, without having to completely disengage the nut.

Has a thick dense pure zinc layer covering the surface of steel fasteners, it can avoid the steel substrate and any corrosive solution contact, protect the steel fastener substrate from corrosion. In the general atmosphere, the surface of the zinc layer forms a very thin and dense zinc oxide layer surface.