Barrel Bolts (Sex Bolts)
Mating Fasteners, also known as Sex Bolts, Architectural Screws, Binding Screws, Binding Bolts, Binding Posts, Chicago Screws, Male and Female Bolts, Post and Screw, and Threaded Rivets, combine a female barrel paired with a male screw for clamping material between the barrel and screw heads or bridging gaps between two components, such as passing through a hollow door.