Pig's ear fasteners are a type of construction fastener, mainly used for the assembly of scaffolding and steel tube scaffolding. Their main applications include: - Fastening and connecting: Pig's ear fasteners are used to fasten and connect various components of steel tube scaffolding, ensuring structural stability and safety. They transmit force by meshing the outer thread of the inner tube with the inner thread of the outer (sleeve) tube, achieving the function of firmening and connecting. - Load-bearing and support: Pig's ear fasteners can bear certain loads and are suitable for the assembly of scaffolding of different heights and weights.