Abstract: The present disclosure provides a sub-assembly of a medicament delivery device, the sub-assembly comprising: a tubular outer cap extending along a longitudinal axis, an inner cap at least partially surrounded by the tubular outer cap, and a clutch formed by a driving part and a driven part. The inner cap is configured to be removably attached to a housing of the medicament delivery device via a rotational attachment. The driven part is attached to the inner cap and positioned between the tubular outer cap and the inner cap in a direction transverse to the longitudinal axis. The outer cap is axially movable relative to the inner cap between a proximal position and a distal position. The tubular outer cap comprises the driving part extending from a body of the tubular outer cap. The driven part extending in the direction transverse to the longitudinal axis towards the tubular outer cap.