General countersunk head used to request connection

Loading... The surface of the bolt is smooth and there is no protrusion, because the countersunk can be screwed into the part. The round head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large. In addition, in order to meet the needs of locking after installation, there are holes in the head and holes in the rods, which can not loosen the bolt when it is vibrated. Some bolts without threads are to be thin, called thin waist bolts. This type of bolt facilitates the coupling of the force. There are special high-strength bolts on the steel structure, the head will be larger and the size will change. In addition, there are special uses: T-slot bolts, the most used on machine tool fixtures, special shape, cut off both sides of the head. Anchor bolts for machine and floor attachments are available in a wide variety of shapes. U-bolts, as mentioned above. and many more. There is also a special stud for welding. One end has a thread and one end is not welded. It can be welded to the part and the other side can be directly screwed.