Nuts | Rivet Nuts

Attachment Technologies

Self Clinching
Surface Mounting
Broaching
Adhesive Solutions

Overview

Rivet nuts or blind rivet nuts somewhat resemble blind or through-hole standoffs in their general form, but they’re designed to deform or collapse in a controlled manner upon tightening with a mating external thread. This is achieved by counterboring the head or flange side of the nut for some length, creating a slightly thinner wall before the regular threads towards the end of the rivet nut. This thin wall collapses on the opposite side of a panel to preload a joint with access only to the installation side.

Application

The applications in which rivet nuts truly shine are cases in which a strong, reusable thread is needed in a panel that is accessible only from one side due to the assembly. Consider a bottle cage on a bicycle. The frame of a bicycle is made from metal piping with a sealed off interior, leaving few options for attaching a variety of accessories. A small, threaded rivet requires only a single hole to be drilled in the piping which is blocked after the rivet is installed. The provided threads allow for a stock bottle cage to be securely fixed to the frame while allowing for removal if a different size is preferred.

Alternative Solutions

Without rivet nuts, both sides of the install surface need to be accessible. The next best solution might be drilling through the pipe for loose nuts and bolts, requiring more parts and complicating the assembly to securely fix the bottle cage. Without breaching the frame, brackets could be fastened around a pipe to provide a mount, but this is even more complicated and relies on friction to secure the accessory. Despite its advantages, the rivet nut can only resist torque in a round hole with the clamping pressure between the flange and the collapsed barrel. Applications with larger components and greater forces might utilize a hex barrel rivet nut with a similarly hexagonal hole to resist free spinning, but this involves more specialized tooling to manufacture and assemble.

Common Attachment Technologies

While rivet nuts have their own mechanism for attaching to a panel, they come in varieties of round and hexagonal barrels for different torque needs, blind and through-holes, and even studs to have an external thread that can be installed from one side of a panel.