We can supply from M2.0 to M64, and the material in stainless steel, brass Metal Hexagon Connector NutMaterial:Carbon steel,stainless steel,Grade:4.8,6.8. 8,10 Size:M3 to M30 Surface:Zinc plated Plain,BlackMaterial:Carbon steel,stainless steel,Grade:4.8,6.8. 8,10Size:M3 to M30Surface:Zinc plated Plain,BlackPacking:25KG for a carton or 8 box in a carton then in Standard pallet Metal Hexagon ...