... 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 ... tools: hardness tester, Height ruler, Depth ruler, Outside ruler, Venire Caliper, etc. Best service:1.Good communication with every of our ...