Quesion: what is tapping?
Answer: To use a tap to cut out the internal threads on the wall of the hole.
Reference knowledge:
Thread specifications Thread pitch Thread bottom hole diameter
M2 standard 0.40 1.60
Fine teeth 0.25 1.75
M2.5 standard 0.45 2.10
Fine teeth 0.35 2.20
M2.6 Standard 0.45 2.20
Fine teeth 0.35 2.25
M3 standard 0.50 2.60
Fine teeth 0.35 2.70
M3.5 standard 0.60 3.00
Fine teeth 0.35 3.20
M4 standard 0.70 3.40
Fine teeth 0.50 3.60
M5 standard 0.80 4.20
Fine teeth 0.50 4.60
M6 standard 1.00 5.10
Fine teeth 0.75 5.30
M8 standard 1.25 6.80
Fine teeth 1 1.00 7.10
Fine teeth 2 0.75 7.30
M10 standard 1.50 8.60
Fine tooth 1 1.25 8.90
Fine teeth 2 1.00 9.10
Fine teeth 3 0.75 9.30
M12 standard 1.75 10.40
Fine teeth 1 1.50 10.60
Fine teeth 2 1.25 10.90
Fine teeth 3 1.00 11.10
M14 standard 2.00 12.20
Fine teeth 1 1.50 12.60
Fine teeth 2 1.00 13.10
M16 standard 2.00 14.20
Fine tooth 1 1.50 14.60
Fine teeth 2 1.00 15.10
M18 standard 2.50 15.70
Fine teeth 1 2.00 16.20
Fine teeth 2 1.50 16.60
Fine teeth 3 1.00 17.10
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