FIELD: fasteners.
SUBSTANCE: in an internal sealing washer with double protection, radially outer metal part (12), having dielectric coating, and radially inner polymer part (18), interacting with the metal part at the interface due to a tight fit, are used. The polymer part has at least one conical compression surface (24, 30) for interaction with the surface of a structure near a hole, and it also has surface (26, 56) for contact with a fastener for interaction with the mating surface on an element of a fastening system. Tightening of the fastener leads to compression of at least one compression surface, which causes a given pressure in the polymer part in the joint created by the fastener and the structure.
EFFECT: obtaining an internal sealing washer with double protection.
20 cl, 12 dwg
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