Blind rivet-nut and method for securing a component to a carrier
A blind rivet-nut having an annular-flange-like setting head and a hollow shaft for securing a blind rivet-nut in an opening of a carrier. The hollow shaft has a free end having a threaded portion for receiving a threaded element of a tensioning tool. A clamping portion adjacent to the setting head forms a bead-like deformation when the tensioning tool is used to clamp the carrier between the bead-like deformation and the setting head. A threadless shaft portion is formed between the clamping portion and the threaded portion. The threadless shaft portion is threaded by a thread self-rolling or thread self-tapping fastener. The fastener is received in a positive-locking manner when the fastener is screwed into the thread formed on the previously threadless shaft portion. A method is also disclosed for securing a component to a carrier by a blind rivet-nut.
1. A method comprising:
assembling a carrier defining an opening to a rivet-nut including a hollow shaft having an internal thread on a free end, a head, and an internal portion between the head and the free end;
compressing the rivet-nut by pulling the free end toward the head to form a bead on the opposite side of the carrier from the head; and
tapping a thread on the internal portion with a fastener.
2. The method of claim 1 further comprising:
clamping the carrier between the head and the bead.
3. The method of claim 1 wherein the fastener is a self-tapping bolt.
4. The method of claim 1 wherein the step of compressing the rivet-nut is performed by a tensioning tool having a threaded end that is threaded into the internal thread on the free end to pull the free end toward the head and thereby form the bead.