Fastening elements for vibration
​​​​​​​and noise decoupling


Fasten and decouple

Excessive noise and vibration cause problems. They can affect the performance of a product negatively if it wears out earlier as a result, shows a less efficient performance or - in extreme cases - has a shorter product life due to a mechanical failure.

The new product group of SITEC® vibration and noise decoupling fastening elements is our answer to today’s trend toward the NVH development (NVH=Noise, Vibration, Harshness).
​​​​​​​We only address vibrations produced by actuators such as pumps, compressors and engines.

This product is made by Böllhoff

Method / principle

There are different approaches to reduce noise and vibration.

One method to reduce vibration and the resulting noise emission is damping.
Another method to reduce noise emission is the vibration isolation.


Our SITEC® products are used in industries such as public health engineering, electrical engineering and the automotive industry. Typical fields of application are radiators, auxiliary heating systems, inverters and many more.

Product benefits
  • Vibration and noise decoupling
  • Adjustable parameters for a flexibility in design (material, connection solution)
  • Fast and easy

Detailed description


1) Damping

One method to reduce vibration and the resulting noise emission is damping. During material-based damping, kinetic vibration energy/energy is converted into thermal energy. The principle of damping describes the reduction of an output quantity over time. Such conversion can be realised with the SITEC® fastening elements when using technical elastomers.

Decoupling technology – Damping

2) Isolation

Another method to reduce noise emission is the vibration isolation. In contrast to damping, there is no conversion of energy to reduce the amplitude, but a detuning of vibration.
With this principle, an excitation is directly absorbed by an elastic fastener and only transferred with a considerably reduced amplitude through a tuned spring rate. This type of reduction is primarily employed for strongly vibration-emitting applications.

Decoupling technology – Isolation

Product variants

Every project deserves a tailor-made solution.

Learn more about the product types and find the right variant for your particular application.

SITEC® Rivet

The decoupling blind rivet nut.

With this decoupling blind rivet nut you are able to fasten a high-strength thread body to a thinwalled component with an additional vibration and noise decoupling effect.



The decoupling plug-in connection.

The SITEC® Pin consists of a plastic stud and a soft damping element. With two undercut geometries, this fastener smoothly fits into bore holes in different plate thicknesses without the use of a tool. Pressing down the stud expands the bottom part and the fastening is done.



The decoupling clip system for screw joint.

The SITEC® Clip is fast and easy to install on the plate geometry of your application. Two fasteners which are identical in design are - with an offset of 90° - clipped together in a round bore. Introduction of the screw through the metal sleeve of the SITEC® Clip and fastening with a weld nut on the rear of the receiving part.


SITEC® Spring

The decoupling spring system with screw connection.

The purpose of the SITEC® Spring fastener is to isolate vibration. The plug-plug-screw method is fast and assembly is easy.
With the selected springs, the individually assembled fastener thus efficiently isolates the vibration of your application.



Find out more: related downloads.

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Fastening elements for vibration and noise decoupling
English 01/2023 5390 kB / PDF
English 01/2023 5390 kb / PDF

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