rivet nut: material:carbon steel or stainless steel Diameter:M4,M5,M6,M8,M10,M12 standard rivet nut With good quality ... body, plain, with flat head 2) High crimping force 3) Screw length can be varied 4) Just-in-time manufacturing capability ... steel, aluminum, stainless steel, etc.6) Superior blind rivet nuts: M4-M10Standards:GB,DIN,ANSI,BS and so on.Packing:20 ...