... :GR2 ,GR5 2.DIN 912,DIN 933, DIN 7991, all of head type we make 3. size :M3 -M24 Specifications:titanium bolt nut ... screw fastener bolt:M3-M22*length5mm~160mm nut:M3-M30 Washer:M3-M30 Application:motor ... ,auto,bicycle,racingtitanium bolt for disc brake rotorStandard:GB,DIN,ASME,BSW,UNC,JISGread:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9 ...