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).所敘述者係一用於蓋住一藥物容器(20)的一針(26)上之一針屏蔽件(29)的帽蓋(60)，該帽蓋(60)包括：一圓柱形部分(61)，具有一第一外徑；一盤部(62)，被設置在該圓柱形部分(61)之一遠側端上，該盤部(62)具有一大於該第一外徑的第二外徑；及一抓握表面(63)，被設置在該圓柱形部分(61)的一內表面上，且被設計成適於摩擦地嚙合一針(26)上之一針屏蔽件(29)。
