Fasteners and fastener systems

A fastening system for securely coupling a first body to a second body, the fastening system comprising:

• a fastener comprising an elongate arcuate body and a retaining portion, the elongate arcuate body curved along a longitudinal axis and having a cross-sectional area taken planar normal to the longitudinal axis,
• the elongate arcuate body comprising a first portion separated along the longitudinal axis from a second portion with the cross-sectional area of the elongate body increasing from the first portion to the second portion, a first cross sectional area taken proximate to the first portion is smaller in area than a second cross sectional area taken proximate to the second portion, the fastener further having a retaining portion;
• the retaining portion comprises a rod member extending from and pivoted by a proximal end to the elongate arcuate body proximate to the first portion;
• a converging passage delineated between the first body and the second body when coupled, the converging passage configured to receive the elongate arcuate body of the fastener therewithin in an inserted configuration where the first body and the second body are prevented from decoupling;
• and
• a retainer configured to be selectively secured to the first body and configured to:
• selectively engage the retaining portion of the fastener to selectively force the elongate arcuate body into the inserted configuration in a tightening procedure where the retainer forces the fastener to move into the converging passage and prevents retraction of the elongate arcuate body from the inserted configuration, and
• selectively attach to a distal end of the rod member to mechanically block retraction of the elongate arcuate body from the inserted configuration.