Wingnut (hardware)
From Wikipedia, the free encyclopedia
For other uses, see Wingnut.
A wingnut, wing nut or butterfly nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/e/e8/Wingnut-hardware.jpg)
A similar fastener with a male thread is known as a wing screw[1][2] or a wing bolt.[3]