Metal cable having two layers of construction 4+N comprising an inner layer C1 of four wires of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer C2 of N wires of diameter d2 wound together in a helix at a pitch p2. The cable has the following characteristics (d1, d2, p1 and p2 in mm): 0.25