... Size: M3-M22 Standard NO.: DIN933,DIN931,DIN934 Material:: Carbon steel,stainless steel Grade: 4.8-12.9 Finish: zinc,black,chrome,nickel ... customers have any products of similar manufacturing methods,please send us the drawing and specifications2.Services and Support • Good after ... Europe,Southeast Asia,Africa,Oceania,Mid East,Asia,Western Europe,US, South Korea, Russia and so on other countries and ...