A surgical fastening system for implantable devices such as injection port systems. The plunger stopper cooperates with a step portion of a plunger to limit movement of the plunger in a state where a slide surface of the plunger contacts an inner peripheral wall surface of the cylinder hole. A fiber optic cable runs adjacent to a top of the security fence, and passes through each of the stress inducing devices. In still another embodiment, a stroke limiting member is provided that may be used to enable a fitting that is designed to be pulled up by turns to also be pulled up by torque.