Inch sized fasteners and more

BSW Whitworth standard thread BS 84

Table for BSW Whitworth standard thread BS 84

Threads per Inch

pilot holeØ mm

Millimeter

Inch Decimal

1/16

60

1,15

1,5875

0,0625

3/32

48

1,80

2,3813

0,0938

1/8

40

2,55

3,1750

0,1250

5/32

32

3,10

3,9688

0,1563

3/16

24

3,65

4,7625

0,1875

7/32

24

4,40

5,5563

0,2188

1/4

20

5,10

6,3500

0,2500

9/32

20

7,1438

0,2813

5/16

18

6,50

7,9375

0,3125

3/8

16

7,90

9,5250

0,3750

7/16

14

9,30

11,1125

0,4375

1/2

12

10,50

12,7000

0,5000

9/16

12

12,10

14,2875

0,5625

5/8

11

13,50

15,8750

0,6250

11/16

11

15,00

17,4625

0,6875

3/4

10

16,50

19,0500

0,7500

13/16

10

18,00

20,6375

0,8125

7/8

9

19,25

22,2250

0,8750

15/16

9

21,00

23,8125

0,9375

1

8

22,00

25,4000

1,0000

1.1/8

7

24,75

28,5750

1,1250

1.1/4

7

27,75

31,7500

1,2500

1.3/8

6

30,50

34,9250

1,3750

1.1/2

6

33,50

38,1000

1,5000

1.5/8

5

35,50

41,2750

1,6250

1.3/4

5

39,00

44,4500

1,7500

1.7/8

4.1/2

41,50

47,6250

1,8750

2

4.1/2

44,50

50,8000

2,0000