Abstract: A threaded fastener-nut combination for attaching two work pieces together has means for preventing the intrusion of the fastener threads into the bores of each work piece, thus preventing damage to the work piece which may result from such intrusion. The stud member has a pawl member which extends radially outward to engage an aperture in the nut member, which locks the nut member to the stud member. The engagement of the nut member to the threaded portion of the stud member produces both audible and tactile feedback to indicate that the fastener is properly placed and engaged. Tactile feedback is returned through the emergence of the pawl through the aperture in the nut, and by the rotation of the entire fastener assembly upon the provision of further tightening effort. Auditory feedback is provided through a “click” or similar sound produced when the pawls engages the aperture of the nut.

Abstract: A threaded fastener-nut combination for attaching two work pieces together has means for preventing the intrusion of the fastener threads into the bores of each work piece, thus preventing damage to the work piece which may result from such intrusion. The stud member has a pawl member which extends radially outward to engage an aperture in the nut member, which locks the nut member to the stud member. The engagement of the nut member to the threaded portion of the stud member produces both audible and tactile feedback to indicate that the fastener is properly placed and engaged. Tactile feedback is returned through the emergence of the pawl through the aperture in the nut, and by the rotation of the entire fastener assembly upon the provision of further tightening effort. Auditory feedback is provided through a “click” or similar sound produced when the pawls engages the aperture of the nut.