#screw  a fastener with a tapered threaded shank and a slotted head
  supertype:  holdfast__fastener__fastening  restraint that attaches to something or holds something in place
  subtype:  Allen_screw  bolt.screw  cap_screw  machine_screw  metal_screw  Phillips_screw  thumbscrew  woodscrew  worm.screw
  part:  head.projection  a projection out from one end; "the head of the nail", "a pinhead is the head of a pin"
  part:  screw_thread__screwthread__thread  the raised helical rib going around a screw

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