ends of the rivets being recessed in the facings the organic facing having a plurality of equally spaced notches extending radially inwardly from and circumferentially along the periphery of the disk the peripheral edge of the notches being open for the circumferential length of the notches the ceramic metallic friction facing filling the notches application_number US 77817185 A description fig3 shows a partially cutaway front view of the clutch disk in accordance with the present invention in fig3 is an output side spline hub and 12 is an outward flange formed on hub 11 an annular clutch plate 13 and a retaining plate 14 are arranged on the opposite sides of the flange 12 torque is transmitted from the clutch plate 13 and the retaining plate 14 through plural coil springs 15 to the flange 12 and the hub 11 as in the case with a conventional clutch disk the clutch plate 13 and the retaining plate 14 are so connected in conventional manner to rotate together by means of stud pins not shown in the figure distributed at plural places on the circumference an inner peripheral edge of a flatly and annularly shaped driven plate 16 is fixed to an outer peripheral edge of the clutch plate 13 with rivets 17 organic facings 18 and a ceramic metallic facing 19 are fixed to the opposite sides of driven plate 16 the organic facing.