Special Features:

Slotted, round head machine screw toggle bolts are self-contained anchoring devices w/two-piece spring, sheet metal wings which automatically open or swing into place after being pushed throught an open hole accessible fromone side only; trunnion nut material die cast zinc; wings are pivoted either on trunnion nuts or pins and held normally in open position by a spring placed inside the u or channel shape wing groove; proof load 350 lbs

Properties:

An externally threaded fastener whose threaded portion is of one nominal diameter having a wing or wings mounted on the bolt head or on a trunnion nut. The wing or wings upset when the toggle bolt is inserted in a constricted passage in a hollow wall and when the bolt is tightened, the wing or wings assume a transverse or athwart position. It is used for securely holding fixtures or devices to hollow walls.