Described is a cap (60) for covering a needle shield (29) on a needle (26) of a medicament container (20), the cap (60) comprising a cylindrical portion (61) having a first outer diameter, a disc portion (62) disposed on a distal end of the cylindical portion (61), the disc portion (62) having a second outer diameter larger than the first outer diameter； and a gripping surface (63) disposed on an inner surface of the cylindiral portion (61) and adapted to frictionally engage a needle shield (29) on a needle (26).
