On this parts fiche the Screw Tceif M6x16 is the most specified component.
A sample from the products for the 025 - Freno Posteriore include: O-ring, Front R.h. Plate, Circlip E-type, Screw, Special.
The thirty-seven Sbk1299 2017 Usa (superbike 1299 Abs) D220-00017 025 - Freno Posteriore component parts are all listed in this schematic.