In one aspect, a safety pen needle assembly is provided which includes a hub, a needle fixed to the hub, and a shield formed to at least partially telescope over the hub. Thread elements permit relative rotation between the hub and the shield. Initially, the elements are in threaded engagement with the shield being positioned relative to the hub with a distal end of the shield sidewall being located distally of a distal end of the needle. Also, in the initial state, the shield and the hub are configured with a rotation-resistance arrangement which inhibits relative rotation between the hub and the shield. The rotation-resistance arrangement is surmountable to allow relative rotation between the hub and the shield with an at least threshold amount of torque being applied, the threshold amount of torque being greater than required to mount the pen needle assembly onto an injector body.
