Item: rivet nut Material: low carbon steel Size: M3-M12 Different standards are available! Name: rivet nutMaterial: Low carbon steelSize: M3-M12Zinc plate: Colorful, white, blue. Type: 1. Head can be flat, thin, countersunk 2. Body can be round, hex 3. Hex can be half hex, all hex, outer hex, inner and outer hexPacking: 25kgs/carton Rivet nuts