... Strict QA Check and OEM available Quality Control Certificate owner Metric Yellow M5 Rivet Nuts Rivet nuts Basic Product Information:1 ... : round, knurled, hexagon, blind5.Sizes:GB-M3 to M12 with metric standard threads UNC 6-32, 8-32, 10-24. 1 ... our factory and your kind inquiry will be much appreciated. Metric Yellow M5 Rivet Nuts