Heavy-Duty Button Rivet Locking Nuts Carbon Expansion Screw Petal Nuts

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Made from carbon steel that combines strength with workability for reliable fastening in metal fabrication, automotive assembly, and equipment repairs
The steel body withstands repeated torque without stripping or deforming, giving you threaded mounting points that hold up through years of use in workshops and garages
These rivet nuts install from one side of the material — insert into a pre-drilled hole, use a rivet nut tool or hand setter, and the body expands to clamp firmly against the back surface
No need to reach behind panels, frames, or hollow sections. Keep this set in your toolbox for quick fixes, custom fabrication, and professional-grade repairs
Perfect for thin sheet metal, square tubing, and enclosed spaces where traditional nuts and bolts can't reach. Suitable for securing brackets, panels, license plates, furniture components, machinery guards, and structural reinforcements