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trozowski peger fastener studs are a type of fastener used in sheet metal, thin plates, chassis, and cabinets. During connection, one end must be screwed into a part with an internal threaded hole, while the other end passes through a part with a through-hole, and then a nut is tightened, firmly connecting these two parts into a single unit. This type of connection is called a stud connection, which is also a detachable connection, mainly used when one of the connected parts has a large thickness, requires a compact structure, or frequent disassembly makes bolt connections unsuitable. The shape of a press-rivet nut stud has one end appearing as