1>Certificate:ISO:9001:2008 2>Grade:Gr1,Gr2,Gr3,Gr4,Gr5(Ti-6AL-4V),Gr7,Gr9,Gr12 3> ... ,DIN931,DIN934,DIN7991,DIN9654>Washer sizes:M4-M165>Grade:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr236>Application:chemical industry,aerospace ... ,motorcycle,car,especially racing bicycle,racing car,racing motorcycle. colored titanium screw