Pen needle assembly for preventing under-torquing and over-torquing of pen needle

摘要

A pen needle hub (251) and cover (261) for a pen needle assembly that provides tactile and/or audible indicia of proper attachment between the hub of the pen needle and the pen is provided. Such indicia substantially prevent under- and over-torquing of the pen needle. The tactile indicia may include a user sensing a wave of a torque of peak value followed by a torque of lesser value.