threader

from WordNet (r) 3.0 (2006)

threader
    n 1: a blunt needle for threading ribbon through loops [syn:
         {bodkin}, {threader}]

from The Collaborative International Dictionary of English v.0.48

Threader \Thread"er\, n.
   1. A device for assisting in threading a needle.
      [1913 Webster]

   2. A tool or machine for forming a thread on a screw or in a
      nut.
      [1913 Webster]