Toggle Wing Nut: 

Toggle Nut   Designed for one-time installation of a variety of fixtures to walls. They are used in hollow material like drywall, plaster board, sheet rock, hollow tile or paneling. INSTALLATION GUIDE – 1. Drill hole completely through wall. 2. Place item to be attached between the bolt head and toggle wing nut. Fold toggle wings all the way back insert through the hole until wings spread into place. 3. Pull wings against inside of the wall, and tighten with a screwdriver until secure.

General:

A toggle bolt, also known as a butterfly anchor, is a fastener for hanging objects on hollow walls. It have wings that open inside a hollow wall, bracing against it to hold the fastener securely. The wings, once fully opened, greatly expand the surface area making contact with the back of the hollow wall. This ultimately spreads out the weight of the secured item, increasing the weight that can be secured compared to a regular bolt. A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads’ friction (with slight elastic deformation, a slight stretching of the bolt, and compression of the parts to be held together. In applications where vibration or rotation may work a nut loose, various locking mechanisms may be employed: lock washers, jam nuts, specialist adhesive thread locking fluid such as Locite, safety pins (split pins) or lockwire in conjunction with castellated nuts, nylon inserts (nyloc nuts), or slightly oval-shaped threads