... packing poly bag carton material: Carbon steel, Alloy steel, stainless carriage screw bolt:M3-M22*length5mm~160mm nut:M3-M30 Washer ... :M3-M30 carriage screwStandard:GB,DIN,ASME,BSW,UNC,JISGread:Gr1,Gr2,Gr3 ... ,Gr5,Gr7,Gr9,Gr12,Gr23Application: Bicycle,Motorcycles,car,bike, machine, industry,military,metallurgy,medical machinery,survey,corrosion Our ...