AGRIA compatible right/left tiller knife Screw and nut Thread: M8 x 1 L (mm): 30 G (mm): 19 : 10.9 Dimensions (mm): M8 x 1 x 30, 10.9 per blade: 2 Right knife code: 180AGR-11R Original right code: NH 16549 Left knife code: 180AGR-11L Original left code: NH 16548 Screw and nut code: 18030-830 NS