... QA Check and OEM available Quality Control Certificate owner Metric Yellow M5 Rivet Nuts Rivet nuts Basic Product Information:1.Material ... :carbon steel, aluminium, stainless steel 2.Finish:Zinc Blue,Zinc Yellow,Zinc Clear, Nickel Flash3.Head shape: Flat head, small head ... factory and your kind inquiry will be much appreciated. Metric Yellow M5 Rivet Nuts