The use of hexagon socket self-tapping screws and external hexagon self-tapping screws

The hexagon socket head tapping screw is usually used in machinery. Its main advantages are that it is easy to fix and remove, and it is not easy to slip and fall. The hexagon socket head tapping screw wrench usually rotates 90°, so one end is long and the other end is short. When tightening with the short side, holding the long side saves a lot of force and tightens the screw better, the long end has a round head (hexagonal cylinder is similar to a sphere) and a flat head, the round head can be easily tilted and removed, To install some parts that are not easy to tighten.

The use of hexagon socket head tapping screws is very simple, but it is very troublesome to say. So let's do an experiment. When tightening the hexagon socket self-tapping screw, we can draw a torque connection curve. If the socket socket self-tapping screw penetrates to point A on the plastic part, the transmitted torque will increase slowly. Tapping the screw has reached the apex of the thread, then torque to point B, then screw the screw into the plastic connection to make it more secure. If you continue to apply torque at point C, the plastic will begin to yield and the socket head cap screw will deform, from point C to point D, the thread will quickly leave the hole. The thread must reach a certain depth, but not beyond point B. Workers must be instructed not to exceed this torque level and set the torque wrench to a certain value.