The present invention concerns compounds and their use to inhibit the activity of a receptor tyrosine kinase. A push fitting assembly at the first end of the body includes a housing. Therefore, at the beginning of the pressing operation, the internal stress of the sealing member is higher in the opening-side portion than in the bottom-side portion. The device comprises a self-alignment member 21 centered on the non-rotating race 9 and provided with axially elastic elements 23. The said hardware platform unit uses an embedded system platform or a server platform.