Four-blade straight fluted tap with thread structure

The utility model relates to the technical field of four-blade straight fluted taps, and discloses a four-blade straight fluted tap with a thread structure, which comprises a fixed square head, a cutting tool bit and a main body, one end of the cutting tool bit far away from the main body is provided with a cutting round head, the cutting tool bit is fixedly connected with the main body, the outer wall of the main body is provided with a chip groove, and the chip groove is provided with a thread. The main body is provided with a threaded knife edge at the joint of the chip groove, a fixed round head is fixedly connected to the face, close to the fixed square head, of the main body, a chip outlet is formed in the end, close to the chip groove, of the fixed round head, and the end, at the chip outlet, of the fixed round head is fixedly connected with a guide shaft. The fixing square head is connected with the fixing round head in a matched mode. According to the utility model, not only is the assembly convenien