The F-BUS is a metal bushing used to make the AF-ILEV work on stainless tubes. This component is slightly bigger, intended to fit perfectly inside the interior of stainless steel pipes and only that. Fits M12 bolt size.
You will find a similar bushing already applied to the AF-ILEV. However, they have a slight size difference that makes them work only on the interior of plastic covered pipes. Be sure to have the right bushing on when installing an AF-ILEV on stainless steel pipes.
Antistatic (ESD): Compatible with EP-96-ST and EP-96-BK
A Flexpipe Product
For technical details and images, please search for the product using the 80/20 interactive catalogue found here: https://catalogs.8020.net/80-20-Catalog-26/C/.