Fastener system, fastener system article, and method

A fastener system for retaining a loose elongate fastener in a counterbore, comprising:

• (a) a bolt having a polygonal head for being received and retained in a counterbore in a structure and in generally flush relation to a surface of the structure surrounding the counterbore;
• the head of the bolt defining a first recess therein for communicating with an edge thereof;
• (c) a second recess formed in the structure and communicating with the counterbore for being aligned with the first recess;
• and
• (d) a retaining member adapted for being positioned in the aligned first and second recesses to trap the loose bolt in the counterbore.

A method of retaining a loose elongate fastener in a counterbore, comprising the steps of:

• (a) providing an elongate fastener having a head for being received and retained in a counterbore in a structure in generally flush relation to a surface of the structure surrounding the counterbore, and a retaining member for being secured to the structure proximate the counterbore and overlapping the counterbore to trap the loose fastener in the counterbore;
• (b) positioning the fastener in the counterbore;
• (c) positioning the retaining member in overlapping relation to the head of the fastener;
• and
• (d) securing the retaining member to the structure.