20 to 28 dao grain diameter 3 x7 (3070511).
Diameter: 30-45 with knife grain: 3 x10 30-36 (3100511) two, three grain of 40-63.
Diameter: 50-160 with knife grain: 3 x13 (3130511).
80 mm = 4, 100 mm = 5 grains.
With screw: 20 to 28 to match the M5, 30 to 45 - with M6, 50-160 - with the M8