This end cap closes the housing bore at the shaft end, sealing the internal bearing arrangement against dust and moisture ingress from the open side. The component has a net mass of 0.008 kg, making it a lightweight closure element rather than a load-bearing part. The KASK05 end cap fits into the corresponding housing unit and is installed by press-fitting or snapping into the machined recess at the bore end. Its purpose is purely protective: it keeps contaminants out of the bearing cavity and retains lubricant inside the housing, supporting the sealing performance of the complete unit without adding any radial or axial load capacity of its own.