SIZE: M3-M30 Grade:4.8 ,8.8 STANDARD: DIN,GB,ISO,ANSI FINISH: PLAIN, ZP, NICKLE PLATE,BLACK PACKING:AT BUYER'S OPTION PRODUCT: DIN934 HEXAGON NUTSIZE: M3-M30Grade:4.8 ,8.8STANDARD: DIN,GB,ISO,ANSIFINISH: PLAIN, Zinc-plated, NICKLE PLATE,BLACKPACKING:AT BUYER'S OPTION