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Metric Tap and drill sizes

Course Thread Sizes Fine Thread Sizes
Thread Tap (outer dia.) Drill (inner dia.) Thread Tap (outer dia.) Drill (inner dia.)
M1 x 0.25 0.75
M1.1 x 0.25 0.85
M1.2 x 0.25 0.95
M1.4 x 0.3 1.10
M1.6 x 0.35 1.25
M1.8 x 0.35 1.45
M2 x 0.4 1.60
M2.2 x 0.45 1.75
M2.5 x 0.45 2.05
M3 x 0.5 2.50
M3.5 x 0.6 2.90
M4 x 0.7 3.30 M4 x 0.35 3.60
M4 x 0.5 3.50
M4.5 x 0.75 3.70
M5 x 0.8 4.20 M5 x 0.5 4.50
M6 x 1 5.00 M6 x .5 5.50
M6 x .75 5.25
M7 x 1 6.00 M7 x .75 6.25
M8 x 1.25 6.80 M8 x .5 7.00
M8 x .75 7.25
M8 x 1 7.50
M9 x 1.25 7.80 M9 x 1 8.00
M10 x 1.5 8.50 M10 x 0.75 9.25
M10 x 1 9.0
M10 x 1.25 8.8
M11 x 1.5 9.50 M11 x 1 10.0
M12 x 1.75 10.20 M12 x .75 11.25
M12 x 1 11.0
M12 x 1.5 10.5
M14 x 2 12.00 M14 x 1.25 12.8
M14 x 1.5 12.5
M16 x 2 14.00 M16 x 1 15.0
M16 x 1.5 15.0
M18 x 2.5 15.50 M18 x 1 17.0
M18 x 2 16.0
M20 x 2.5 17.50 M20 x 1 19.0
M20 x 1.5 18.5
M20 x 2 18.0
M22 x 2.5 19.50 M22 x 1 21.0
M22 x 1.5 20.5
M22 x 2 20.0
M24 x 3 21.00 M24 x 1.5 22.5
M24 x 2 22.0
M26 x 1.5 24.5
M27 x 3 24.00 M27 x 1.5 25.5
M27 x 2 25.0
M28 x 1.5 26.5
M30 x 3.5 26.50 M30 x 1.5 28.5
M30 x 2 28.0
M33 x 3.5 29.50 M33 x 2 31.0
M36 x 4 32.00 M36 x 3 36.0
M39 x 4 35.00
M42 x 4.5 37.50
M45 x 4.5 40.50
M48 x 5 43.00
M52 x 5 47.00
M56 x 5.5 50.50
M60 x 5.5 54.50
M64 x 6 58.00
M68 x 6 62.00

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