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1. An insertable clamp, for temporary assembly of at least two drilled structural parts, the clamp including a main tubular body extending along a longitudinal axis X and having a bearing surface intended to come into contact with a first face of the structural parts, an elastic clip capable of passing through drilled aligned holes, produced in said parts, the clip being translationally moveable along the longitudinal axis, a driver nut whereby the clip is driven by the rotation of the driver nut about said axis and wherein the driver nut is provided with a tapped bore cooperating with a threaded end of said clip, the clip comprising two branches wherein each of the two branches terminate with a hooking spur intended to come into contact with a rear face of the structural parts, said branches are adapted to transversely and progressively move apart along a spreader upon rotation of the driver nut, the spreader being placed between said branches and fixed in relation to the main body, when said branches are exposed to the backward movement of the clip, characterized in that the clamp includes a compression spring placed inside the main body and holding permanently contacting and biasing the threaded end toward the tapped bore when the threaded end is not totally introduced into the tapped bore so that the clip remains constantly aligned with the longitudinal axis.
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