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for Thread Forming Taps

Cold Forming Taps for Internal Threads
Metric Thread Sizes
Tolerance Grade and Hole Size

HOLE SIZES (mm*) WITH PROBABLE ** DRILL SIZES

6H TOLERANCE GRADE

4H TOLERANCE GRADE

Thread

Size (mm)

"MX"

No.

Hole Dia.

Minimum

Probable

Drill

Size

"D"

No.

Hole Dia.

Minimum

Probable

Drill

Size

M1.6x.35

5

1.456

1.45mm

3

1.400

1.4mm

M2x.40

5

1.825

1.85mm

3

1.802

1.8mm

M2.5x.45

6

2.319

2.35mm

3

2.277

2.3mm

M3x.50

6

2.780

2.80mm

3

2.748

2.75mm

M3.5x.60

7

3.232

3.25mm

4

3.200

3.2mm

M4x.70

7

3.674

3.70mm

4

3.640

#27

M5x.80

8

4.626

4.70mm

4

4.579

4.6mm

M6x1.0

9

5.519

5.5mm

5

5.463

5.5mm

M6.3x1.0

9

5.819

5.9mm

5

5.763

5.8mm

M8x1.25

10

7.382

7.40mm

5

7.290

7.3mm

M10x1.50

11

9.247

9.25mm

6

9.174

9.2mm

M12x1.75

12

11.110

7/16"

6

11.025

11.0,,

M14x2.0

14

12.983

13.0mm

7

12.900

SPEC.

M16x2.0

14

14.983

15.0mm

7

14.900

SPEC.

M20x2.5

15

18.705

SPEC.

7

18.602

47/64"

M24x3.0

18

22.443

SPEC.

8

22.305

SPEC.