A connector housing includes one or more cavities for receiving corresponding conductors used to electrically communicate one or more circuits. Moreover, it comprises a control unit for controlling the detection unit, the X-ray generator and the correction unit, a radiographing condition memory accessible by the control unit, a radiographing button for making a radiographing request to the control unit, a radiographing mode setting unit for setting a radiographing mode in the control unit, and a photo timer having an AE function. Teeth on the washer, positioned at right angles to the plane of the washer, are forced into each of the two metal pieces when the fastener is tightened, making electrical connection between the two metal pieces. The variation power sample unit is for determining the variation in power sample values of the modulated illumination field as the modulated illumination field is moved with respect to the slit opening and for determining whether the variation in power sample values has changed significantly since a previous scan. Methods of making and using the extended use device also are disclosed.