Coupling arrangement in a medicament delivery device, said coupling arrangement being adapted to permanently attach a first and a second longitudinally elongated tubular component to each other wherein the coupling arrangement comprises first positive connection means configured to lock the first and the second components to each other such that the components are locked from being moved in a longitudinal direction in relation to each other, and a second positive connection means configured to lock the first and the second component to each other such that the components are locked from being rotated in relation to each other about a longitudinal axis of the components.
