Needle shield with specific roughness

A shield (10) for covering at least part of the distal extremity of an administration device (3), said distal extremity of said administration device (3) comprising a hub (2) on which said shield (10) is intended to be removably engaged, said shield (10) having an open proximal end (11), a closed distal end (12) and a longitudinal wall (13) extending from said proximal end (11) to said distal end (12), the internal face (14) of said longitudinal wall (13) defining an interior cavity (15) for receiving at least part of the extremity of the administration device (3), at least a portion (14a) of said internal face (14) of said longitudinal wall (13) being intended to be in contact with said hub (2) when said shield (10) is secured on the extremity of said administration device (3), characterized in that said longitudinal wall is formed of elastomeric material, said portion (14a) has, distributed over a major portion of said portion (14a), a surface feature (16, 17) that defines the amount of contact between said portion (14a) and said hub (2), said surface feature having a mean radial roughness of more than 2 μm as distributed about a circumference of said portion (14a).