抄録
It is important tightening the screw by fair tighten force. But, it is a difficult that we control the force of tighten screw. Moreover, it isn't researched it in recent years. We demonstrate about tighten characteristics of small screw by torque method. This paper describes that relationship between tightening torque and torque factor, torque factor and measurement number. We got a new useful knowledge about tighten characteristics of small screw.
