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toggle bolt
From Wiktionary, the free dictionary
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English
Etymology
From the resemblance of the hinged wings to a toggle.
Noun
toggle bolt (plural toggle bolts)
- A fastening device consisting of a bolt and a pair of hinged, usually sprung, wings threaded at the hinge to receive the bolt, used by inserting the bolt with wings folded into a small hole in a sheet material to the point where the wings unfold and the bolt can be tightened.
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