It is the threaded plastic part of the needle.
It constitutes the support for the cannula (the ground stainless steel tube) and enables the needle to be screwed onto and unscrewed from the syringe.
It is the threaded plastic part of the needle.
It constitutes the support for the cannula (the ground stainless steel tube) and enables the needle to be screwed onto and unscrewed from the syringe.