Abstract: The method of connecting two workpiece sheets using a rivet, one sheet have a bore, and a counterbore which is frusto-conical and tapers forwardly between a side of the one sheet and the bore, and toward the bore that includes providing a metallic rivet having an axially extending shank defining an axis; providing the rivet with a head having an end face and a forwardly tapered frusto-conical section located forwardly of the end face; installing the shank in the bore and the head in the counterbore so that the periphery of the head end face is substantially flush with the work surface, the end face formed to provide a ring-shaped dome protruding axially in a rearward direction, the dome located to extend about the axis in substantially axial alignment with the outer surface of the shank; the rivet head provided with a peripheral side wall spaced radially from a side wall defined by the workpiece counterbore, and the space between the side walls having a volume A; the dome provided with a metallic volume B; an

Abstract: Tooling to form a countersink or counterbore in a workpiece, the countersink or counterbore intersecting a bore hole in the workpiece, comprises a first part defining an axis to extend axially forwardly in the bore hole; a carrier body having a forward portion for piloting reception in the bore hole, and having a rearward portion adjustably carried by the first part; a cutter blade on the carrier, the blade projecting radially relative to the carrier body and forming at least one cutting edge shaped to form the countersink or counterbore; and a spacer on the carrier body and adjustably retained between the first part and the blade for holding the blade in predetermined axial position on and relative to the carrier body.

Abstract: Tooling to form a countersink and counterbore in a workpiece includes:(a) a first part defining an axis and that extends axially forwardly in a bore hole in the workpiece,(b) a rotatable carrier connected with that first part,(c) and a cutter blade on the carrier, the blade projecting radially relative to the first part forming at least one cutting edge spaced outwardly of a cylinder defined by that first part, the cutting edge shaped to form the countersink and counterbore at one end of the bore hole.

Abstract: Tooling to form a countersink and counterbore in a workpiece includes:(a) a first part defining an axis and that extends axially forwardly in a bore hole in the workpiece,(b) a rotatable carrier connected with that first part,(c) and a cutter blade on the carrier, the blade projecting radially relative to the first part forming at least one cutting edge spaced outwardly of a cylinder defined by that first part, the cutting edge shaped to form the countersink and counterbore at one end of the bore hole.