1)TREATMENT: BLACK TREATMENT 2)PACKING TERM: 25KG CARTON,BULK,ACCORDING TO CUSTOMER 3)SIZE: FROM M8-M30 We can supply all sizes of screws,bolts,nuts with standard of GB,ANSI,DIN,JIS.U BOLTS:1)TREATMENT: BLACK TREATMENT2)PACKING TERM: 25KG CARTON,BULK,ACCORDING TO CUSTOMER3)SIZE:FROM M8-M304)4.8 GRAD ,8.8 GRADE,10.9GRADE,12.9GRADE HEX HEAD Bolts,Nuts,8.8 grade,9.8 grade,10.9 grade