Self-Clinching Nuts

Nov. 15, 2002
These nuts are squeezed into round, punched or drilled holes in sheet metal between a parallel punch and flat anvil.

These nuts are squeezed into round, punched or drilled holes in sheet metal between a parallel punch and flat anvil. The nut is flush or less on the back side. No special hole preparation or tooling shape is necessary.

The self-clinching nut must be harder than the parent sheet material so that when it is squeezed into the sheet, the nut forces the sheet to cold flow into the undercut, locking the fastener to the parent material. For most self-clinching steel nuts, the mounting material should be less than Rockwell B 80 in hardness.

Self-clinching nuts can be used in materials as thin as 0.03 in. and, with some small threads, as thin as 0.02 in. They are available as self-locking prevailing-torque types, floating types, floating self-locking nuts and flush-both-side types. The fasteners are made of heat-treated steel, stainless steel or aluminum. They can be used in metals that are unsuitable for welding. They should be installed after the parent metal is painted, plated or anodized. Self-clinching studs and standoffs are available as well.

Because self-clinching nuts fit into prepared drilled or punched holes, locating jigs and fixtures are not necessary. They can be installed with available automated installation equipment at great labor savings.

Sponsored Recommendations

Aug. 15, 2025
This latest creation isn’t just highly sensitive and dexterous, it's robust enough to survive impacts previous designs couldn't — all while integrating high-speed sensor networks...
Aug. 15, 2025
From plug-and-play to custom solutions, discover high-precision spur and planetary gearheads, as well as screw drives that perfectly match maxon electric motors with respect to...
Aug. 15, 2025
Take a peek inside the design journey of a dual-rotor drone suitable for confined-space inspection in industries such as sewer management, hydro power plants, oil & gas, and chemical...
Aug. 15, 2025
Explore extended capabilities for applications that demand a compact footprint and low weight, including a rigid speed-torque characteristic that optimizes control for precision...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!