Patent ID: 8444359

Claim:
A blind fastener comprising: a split bolt element having two symmetrical half sections split at mating separation faces and cooperatively displaceable between a first collapsed position and a second expanded position, said half sections incorporating a nose portion with a circumferential groove receiving a snap ring; a capture portion adjacent the nose portion having a substantially circular plan form in the first collapsed position with a diameter to be received through an attachment hole in a structural member; a bearing section and a threaded portion both having a substantially circular plan form in the second expanded position, said capture portion having compression surfaces extending with an elliptical major axis greater than said diameter in the extended second position to engage a bottom surface surrounding said attachment hole and said bearing section closely engaged by the attachment hole; a wedge separator element insertable between said half sections to expand said half sections from the first collapsed position to the second expanded position; a nut threadably received by said threaded portion and engaging a lip on a mounting aperture in a monument to be attached to the supporting structure, said mounting aperture concentric with said attachment hole.