butterfly nut

NOUN

a threaded nut with winglike projections for thumb and forefinger leverage in turning

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How To Use butterfly nut In A Sentence

Screw rings, rings nut. Butterfly nut. Butterfly screws.
Screw rings, rings nut. Butterfly nut. Butterfly screws.
These are then put together with a bolt long enough to slide through the main body, and the crosspieces, and with a butterfly nut on the top to allow easy loosening and tightening.