Fuel tank fasteners

An integral fuel tank fastener comprising:

• a multi-layer fuel tank shell having a continuous first layer engaged to a continuous second layer;
• a fastener feature being an elongated hollow protuberance carried unitarily by and projecting from the fuel tank shell, the hollow protuberance having a central axis, a blind cavity, an inner surface, an outer surface and an enlarged head, the inner surface defining the blind cavity and carried by the second layer, the outer surface carried by the first layer, the protuberance projecting axially and concentrically along the central axis to the enlarged head;
• a female clip snap fitted over the enlarged head of the protuberance, the female clip having a base, and a plurality of flexible fingers projecting axially from the base toward the second layer of the fuel tank shell, the plurality of fingers s being axially aligned with and disposed radially outward from the head, the plurality of pronged fingers being spaced circumferentially about the central axis, each one of the plurality of fingers having a tip projecting radially inward from a distal end of the armature, the tips being disposed radially inward from the head.