Tap - Outer Diameter

Inches

Inches

Metric

Inches

Metric

FT2

-

0.316

8.03mm

0.353

8.97mm

FT3

27/64”

0.421

10.70mm

0.465

11.81mm

FT4

33/64”

0.516

13.10mm

0.595

15.11mm

FT4.5

37/64”

0.578

14.68mm

0.648

16.46mm

FT5

21/32”

0.656

16.67mm

0.735

18.67mm

FT6

51/64”

0.797

20.24mm

0.860

21.84mm

FT7

57/64”

0.891

22.62mm

0.970

24.64mm

FT8

1-1/64”

1.016

25.81mm

1.095

27.81mm

FT9

1- 9/64”

1.140

28.97mm

1.220

30.99mm

FT10

1 - 17/64”

1.266

32.15mm

1.364

34.64mm

FT11

1 - 25/64”

1.391

35.32mm

1.485

37.72mm

FT12

1 - 33/64”

1.516

38.49mm

1.610

40.90mm

FT13

1 - 41/64”

1.640

41.67mm

1.732

43.99mm

FT14

1 - 27/32”

1.844

46.83mm

1.990

50.55mm

FT15

2 - 3/32”

2.094

53.18mm

2.240

56.90mm

FT16

2 - 11/32”

2.344

59.54mm

2.490

63.25mm

Internal insert thread size should not exceed 83% of tap drill size