170PC Rivet Nut Kit Mixed Zinc Steel Rivnut Insert Nutsert Threaded Set M3-M12

Material: Carbon Steel, Zinc Plated

Head Type: Flat

Size: M3, M4, M5, M6, M8, M10

Quantity: M3 (45pcs); M4 (45pcs); M5 (35pcs); M6 (20pcs); M8 (15pcs); M10 (15pcs) 

Feature:

Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass etc.

A ribbed body holds the nut in place so it won't turn when tightening a screw.

The tool collapses the nut, creating a backside flange that holds the nut to the material.

Strong and corrosion resistant.

Not easy to rust.