Fastener systems and methods for joining multiple substrates of workpiece

A fastener system for joining multiple substrates of a workpiece, the workpiece having a working side and a blind side, the fastener system comprising:

• a nut member comprising a nut bore with internal threads, the nut member configured for placement of the nut bore over a joining bore through the multiple substrates on the blind side of the workpiece;
• a radially continuous sleeve member formed from a malleable metallic material, the sleeve member comprising an outer sleeve surface with a conductive lubricious coating, the sleeve member configured for insertion in the joining bore through the multiple substrates from the working side of the workpiece;
• and
• a bolt member comprising a head portion, a threaded portion and a shank portion extending between the head portion and the threaded portion, the bolt member configured for insertion in a central bore of the sleeve member, the threaded portion configured for threaded engagement with the internal threads of the nut member,
• wherein, as the bolt member becomes fully engaged with the nut member, the shank portion of the bolt member is configured to cause radial expansion of the sleeve member and the sleeve member is configured to provide an interference fit within the joining bore through the multiple substrates.