This invention relates to a member (401) of friction, in order to brake disk of the vehicle, this friction member comprising a seal (402) intended to act with means (408) of the pressure which brings this seal in contact with a disc associated with a wheel of the vehicle to freiner.conformément to this invention, the member (401) of friction is provided with a surface, intended to be made of a screw - to - screw means (408) of pressure, with a rupture of the angle α such that the action (412) of the means (408) of pressure on the member (401) of friction, comprises a component (414) parallel to and a component (416) perpendicular to the axis (410) of displacement of the means (408) of the pressure which is intended to act on the member (401).
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