Patent ID: 8322015

Claim:
A fastener for clamping work pieces together through aligned apertures, the work pieces including a front side and a blind surface, the fastener comprising: a core bolt comprising a bolt head, a first externally threaded portion and an unthreaded shank portion; a body positioned on the core bolt comprising an enlarged head, a first internally threaded portion, and a smooth wall through bore portion positioned proximate to the enlarged head; and a deformable sleeve positioned on the core bolt between the bolt head and the body, wherein the fastener is constructed and arranged to be insertable through the aligned apertures from the front side, wherein the deformable sleeve expands over the body by rotating the core bolt causing threaded engagement between the first externally and first internally threaded portions and causing the deformable sleeve to bulb and form a bearing surface against the blind surface thereby clamping the work pieces together with the unthreaded shank portion aligned with the smooth wall through bore portion and wherein an outer diameter of the unthreaded shank portion of the core bolt is approximately equal to an inner diameter of the smooth wall through bore portion of the body permitting a close fit of the unthreaded shank portion in the smooth wall through bore portion.