A
fastener adapted to pass through aligned holes through workpieces is disclosed. The
fastener includes a pin member having a transition portion wherein the
diameter of the transition portion decreases radially as it extends from the smooth cylindrical shank portion to the threaded portion. The
fastener may also comprise a sleeve member and a clamping means. The clamping means includes a collar, a nut, or any other possible clamping means. In exemplary embodiments, the workpieces can be formed with a plurality of materials, the materials including composite, metallic, or composite / metallic structures, any combination thereof. In particular embodiments, the fastener has interference capability of 0.0005 to 0.0100 inches in composite structures without risk of composite
delamination or damage. As a result of the fastener interference, gaps between the fastener and the structure are eliminated thereby providing good electrical
conductivity between components. As a result, the potential for electrical sparks is reduced, providing a
safer fastener for use with
aerospace applications.