Related Clues:

• Fastener that turns
• Hardware fastener
• Con's guard
• Carpentry fastener
• Archimedes' device
• Summon (up), as courage
• Bulb base feature
• A driver turns it
• A carpenter may drive it
• Nail's cousin
• "___ you!"
• Mess (up)
• Fastener that may have a Phillips head
• Handyman's fastener
• A simple machine