Related Clues:

• Put the metal to the metal
• Ironworker's union?
• Door pivot
• Iron worker's union
• Rely (on)
• Bond, of a sort
• Join closely
• Join with a blowtorch
• Venus' flytrap feature
• Gate hardware
• Connector with a pivotal role
• Unite with heat
• Squeaky door part
• Depend on - as door does
• Joint on which something turns