An injection device tip includes a body configured to be removably connected to an injection device. A needle has a first portion projecting out from the body and a second portion projecting into a space within the body. The body includes at least one of at least one slot separating flexible portions which can be deflected outwardly to cause release of an engagement between the body and a proximal end of the injection device, at least one slot separating flexible portions which can be deflected outwardly to cause release of a thread engagement, at least one frangible connection arranged on the body, at least one indicator arrangement on the body which provides a visual indication that the pen needle has been previously used, and at least one spacing separating two generally semi-circular or generally semi-cylindrical flexible portions which can be deflected outwardly.
