Clamp (1, 1') comprising a main body (3, 3') adapted to encircle an inner element (101) or to be encircled by an outer element to which the clamp (1) can releasably connect. An axially extending opening extends through the main body (3, 3'). The clamp comprises a locking arm (5) which is connected to said main body (3, 3') at a base end (7), and which can bend elastically to move its oppositely positioned free end (9) in a substantially radial direction. The locking arm (5) comprises a locking pad (13) at a distance from the base end (7), which in a locking position of the locking arm (5) extends radially beyond an inner (4) or outer (4') diameter, respectively, of the main body (3, 3'). The locking pad (13) is adapted to engage with a recess (113) in said inner (101) or outer (101') element.