A fastener assembly is provided. The fastener assembly includes an insert having a radial circumference. An annulus extends from the insert and defines an annular end distal from the insert. The annulus further defines a radial cutout section along a length thereof for providing a flex point. The annulus is configured for being radially compressed by a blind hole of a working surface upon tightening of a nut. A nut is positioned adjacent the insert on an end distal the annulus, and a threaded bolt extends from the nut and through the annulus, wherein the bolt is configured to be accepted by the blind hole.