Special rotary pin

The invention relates to the technical field of connecting pieces, in particular to a special rotary pin which comprises a pin body, notches are formed in the pin body at intervals, the notches penetrate through the pin body from the front end of the pin body to the rear end of the pin body, the pin body is divided into a plurality of base bodies through the notches, non-through round holes are formed in the base bodies, and the round holes are communicated with the pin body. A plurality of top plates are formed in the pin body, and the top plates are used for connecting and supporting base bodies at different positions, the outer portion of the pin body is pressurized, the pin body with the outer diameter larger than the inner diameter of a hole can be compressed into the hole to be matched, after the pin body enters the hole, the outer diameter of the pin body is increased, and zero-clearance fit is formed between the pin body and the hole; and efficient matching between the parts is achieved. 本发明涉及连接件技术领域，