#nut_and_bolt__nutandbolt  a fastener made by screwing a nut onto a threaded bolt
  supertype:  #holdfast__fastener__fastening  restraint that attaches to something or holds something in place
  part:  #bolt.screw  a screw that screws into a nut to form a fastener
     part:  #head.projection  a projection out from one end; "the head of the nail", "a pinhead is the head of a pin"
     part:  #bolt_shank__shank  cylinder forming the part of a bolt between the thread and the head
  part:  #nut.block  a small square or hexagonal metal block with internal screw thread to be fitted onto a bolt

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