STANDARD：DIN434、DIN435、NON-STANDARD SIZE：M9-M30 MATERIAL:MILD CARBON STEEL、S45C、S35C SURFACE TREATMENT: ZINC PLATED BLUE /WHITE,ZINC PLATED YELLOW,HOT DIPPED GALVANIZED,PLAIN,BLACK,PHOSPHATING. PACKING: 20-25KG CARTON BULK PACKING PACKED IN SMALL BOX/PLASTIC BAG THEN IN 20-25 KG CARTON PACKED IN WOOD CASE PACKED IN GUNNY BAG