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.

• 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.
• 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.

• ISO Standard: ISO 4032: Hexagonal thin nuts-Product grade A, ISO 4033: Hexagonal thin nuts-Product grade B
• DIN standard (German Industrial Standard) DIN 439: Hexagonal thin nuts
• ANSI/ASME standard: ANSI B18.2.2: Hexagonal thin nuts

When using a k-lock nut, it is first fitted to a bolt or threaded rod, and then by rotating the nut, it creates a tight contact with the threaded rod. As the nut rotates, the slope interacts with the slope of the threaded rod, creating a friction force that prevents free rotation of the nut.

• Provides greater preload, reducing the likelihood of loosening
• Stays tight when subjected to vibration, shock or other external forces
• Reusable without losing its locking effect

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

• Structure and appearance: K-nuts have a K-shaped appearance with two semi-circular openings
• Locking properties: Provide additional locking force, reducing the risk of loosening
• Installation and removal: Easier to install and remove than hexagonal nuts
• Areas of application: Used where there is a need to prevent vibration or external forces from loosening the bolt or screw

Galvanising is a surface treatment technique of plating a layer of zinc on the surface of metals, alloys or other materials to provide a beautiful and rust-resistant appearance.