A Stud is a type of fastener that has no head, but only external threads on both ends. When connecting, one end of it must be screwed into the part with internal threaded hole, the Other end through the part with a through hole, and then screwed on the nut, even if the two parts are fastened into a whole. This type of connection is called a stud connection and is also a removable connection. It is mainly used in cases where one of the connected parts has a large thickness, requires a compact structure, or is not suitable for bolting because of frequent disassembly.

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