Abstract: A reusable device is presented for effecting a mechanical connection between two elements that are substantially coaxial, the elements subject to traction stresses with reference to each other, and the elements disconnectable beyond a specific traction threshold. The device includes a casing, with a first half and a second half, integrally connected to one of the elements, the casing having a cavity formed between said halves, and said casing comprising elastic material. The other element includes a bulge comprising, for example, a spherical swivel joint that is received in the cavity, the portion of said halves adjacent said cavity separable as the bulge passes into the cavity.