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Current hierarchy for hardware (250)
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hardware (250) hardware (250) exclude
  bearings and rollers (1) hardware (250) -> bearings and rollers (1)  
  belt couplings (3) hardware (250) -> belt couplings (3)  
  chains and chain links (3) hardware (250) -> chains and chain links (3)  
  clasps and fastenings (2) hardware (250) -> clasps and fastenings (2)  
  door springs (2) hardware (250) -> door springs (2)  
  fasteners (46) hardware (250) -> fasteners (46) exclude
    nails (11) hardware (250) -> fasteners (46) -> nails (11)  
    nuts and bolts (3) hardware (250) -> fasteners (46) -> nuts and bolts (3)  
    rivets (13) hardware (250) -> fasteners (46) -> rivets (13)  
    screws (15) hardware (250) -> fasteners (46) -> screws (15)  
  faucets (12) hardware (250) -> faucets (12)  
  gaskets and seals (2) hardware (250) -> gaskets and seals (2)  
  hinges (18) hardware (250) -> hinges (18)  
  hose couplings (3) hardware (250) -> hose couplings (3)  
  knobs (4) hardware (250) -> knobs (4)  
  latches (3) hardware (250) -> latches (3)  
  locks (22) hardware (250) -> locks (22)  
  nut locks (4) hardware (250) -> nut locks (4)  
  packing for joints (1) hardware (250) -> packing for joints (1)  
  padlocks (5) hardware (250) -> padlocks (5)  
  pipe hangers (1) hardware (250) -> pipe hangers (1)  
  plumbing fittings (1) hardware (250) -> plumbing fittings (1)  
  storage cabinets (5) hardware (250) -> storage cabinets (5)  
  tool holding clips (1) hardware (250) -> tool holding clips (1)  
  valves (107) hardware (250) -> valves (107)  
  window sashes (3) hardware (250) -> window sashes (3)  
 
Full Hierarchy | agricultural (3,415) | armaments (145) | combination tools (634) | construction machines (92) | electrical devices (1,400) | gauges (109) | handheld power tools (825)
hardware (250) | household tools (118) | household (2,381) | industrial machines (1,956) | industrial tanks (5) | industrial tools (1,259) | knives and cutters (180) | layout tools (2,670)
manufacturing (357) | material handling (394) | metalworking machines (15,293) | metalworking tools (2,086) | musical instruments (57) | photographic apparatus (484) | pliers (749) | potters tools (3)
propulsion and energy (6,257) | punches (50) | rules (500) | screwdrivers (595) | specialty machines (2,935) | specialty tools (1,784) | stoneworking (154) | structures (125)
tool making (468) | trade specific (5,976) | transportation (1,101) | water distribution systems (238) | woodworking machines (15,653) | woodworking tools (4,189) | work holding (1,662) | wrenches (6,082)

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