Crossword Genius

Fastener (4,3)

Ross

(Other definitions for wing nut that I've seen before include "fixing device" , "Item with two flaps and a thread, tightened by hand" , "It turns easily" , "Screw fastener for easy turning" , "Fastener with two flat lugs to aid tightening" .)

I've seen this clue in the Sydney Morning Herald.
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