AGRIA compatible tiller knife Screw and nut Thread: M8 x 1 L (mm): 30 G (mm): 20 : 10.9 Dimensions (mm): M8 x 1 x 30, 10.9 Right knife code: 180AGR-20R Left knife code: 180AGR-20L Screw and nut code: 18030-830 NS