3 mm can be expressed as a fraction of a centimeter since 1 cm equals 10 mm. Therefore, 3 mm is equivalent to 0.3 cm, which can be written as the fraction 3/10. Additionally, if you want to express 3 mm in inches, it is approximately 1/8 inch, since 1 inch equals 25.4 mm.
0.3
3mm ~= .11815" closest equivalent drill bit-- 7/64" (slightly undersized @ .109")
10 + 3mm = 2010 + 3x20 = 70
3mm = 0.12inch.
3mm.
27/10
3/32
8/10
9/10
3/8
3mm = 0.3 cm
35/1000