Size: M4-M12，#6-1/2
Material: Low Carbon Steel,Middle Carbon Steel
Quabkity: Multi-station Cold Forging,Screw Thread 6H,Smooth Faced without Burrs
Surface:Zinc,White Blue Zinc,Black,Heattreatment,etc.
Packaging:25kgs Carton Bulk,Normal Small Boxed,Gunny Bag,Special Small Boxed or or According to Customers'Requirements