Under the condition of inadequate torque management, contact failure could occur in the interconnecting connector. Contact failure reduces the local immunity and degrades the electromagnetic properties of the equipment. It has been shown in previous reports that connector contact failure causes the parasitic inductance and radiated electromagnetic noise to increase. However, there is not enough discussion about the effects of connector torque fluctuation on the surrounding electromagnetic environment. Thus, in this study, the effects of a changing connector torque value on the circuit response and near field at the contact boundary were investigated. Based on these results, we discuss the influence of torque fluctuation on the electromagnetic environment surrounding the connector.