2D and 3D CAD models available for our entire inventory of fasteners!

Self-Clinching Hex Nuts

Click image to enlarge

Self-clinching hex nuts, also called kal nuts, provide an excellent solution for design engineers with metal assemblies requiring a strong reusable thread. They are designed to provide an internal thread in sheet metal as thin as 1mm and are applicable to ductile materials such as steel, aluminum, or copper panels, or other materials with a Rockwell Hardness of HRB-80 or less. Other features of Captive Fastener Series CKN hex self-clinching nuts include:

  • Low cost of installation

  • RoHS and REACH compliant

  • Heat-treated carbon steel with a clear zinc finish

  • Various configurations to meet your application needs

  • Metric internal 6H thread that meets ANSI/ASME B1.13

2D and 3D prints can be downloaded from our product pages on the website. If you do not see the hex clinch nut you require to complete your application, contact us or request more information today. A friendly and knowledgeable representative will be in touch to assist you.
Self-Clinching Hex Nuts </br> - Series CKN diagram

How to Install Self-Clinching Hex Nuts

Self-clinching kal nuts are explicitly designed to provide easy installation. The self-clinching hex nut is placed in the prescribed hole in the mating panel and pressed into the sheet, becoming an integral part of the chassis. This process eliminates loose hardware, which is especially important in electronic applications. The ductile panel material flows around the clinch profile and forms a strong permanent bond in the assembly. Our self-clinching hex nuts are harder than the metal substrate, so they maintain dimensional integrity and physical properties.

When properly installed, kal nuts have excellent torque out and push out values that meet or exceed industry standards. For further information regarding self-clinching kal nut installation specifications, please download our catalog.

Hex Self-Clinching Nut Design Considerations

The unique yet simple design of hex self-clinching nuts differs from other fasteners, such as rivets, which deform around the sheet metal when installed. Our CKN series of self-clinching hex nuts also offer a green solution that is cleaner than weld nuts, eliminates weld spatter, and removes the need to chase the threads after the welding process. Kal nuts also offer an aesthetic appeal, giving them a cosmetic advantage over weld nuts.

Choose Captive Fasteners for the Industry’s Best Self-Clinching Kal Nuts

Captive Fastener is your #1 source for any self-clinching hex nut need. Since 1974, we have been the premier manufacturer of the market’s best self-clinching fasteners for industrial and electronics equipment produced by leading OEMs. We work hard to provide quality manufacturing services, personalized customer support, and fast turnarounds on every order.

To learn more about our products, capabilities, and how we can best assist your manufacturing operation, contact us or request a quote today.