A high-performance angular rate detecting device is provided. The thickness of the first layer of ILD and the resistor thickness combine to match the nominal design thickness of vias in the layer of concern. A second or clamping member is threadably secured to the lower end of the first member and tightened thereon which causes a segmented collet portion on the first member to be moved into engagement with the rod to positively maintain the rod in selected longitudinal positions with respect to the instrument.