Inch sized fasteners and more

BSF Whitworth fine thread BS 84

Table for BSF Whitworth fine thread BS 84

Threads per Inch

pilot holeØ mm

Millimeter

Inch Decimal

3/16

32

3,90

4,7625

0,1875

7/32

28

4,70

5,5563

0,2188

1/4

26

5,40

6,3500

0,2500

9/32

26

7,1438

0,2813

5/16

22

6,80

7,9375

0,3125

3/8

20

8,30

9,5250

0,3750

7/16

18

7,70

11,1125

0,4375

1/2

16

11,10

12,7000

0,5000

9/16

16

12,70

14,2875

0,5625

5/8

14

14,10

15,8750

0,6250

11/16

14

15,70

17,4625

0,6875

3/4

12

17,00

19,0500

0,7500

13/16

12

20,6375

0,8125

7/8

11

13,50

22,2250

0,8750

15/16

11

23,8125

0,9375

1

10

23,00

25,4000

1,0000

1.1/8

9

26,00

28,5750

1,1250

1.1/4

9

29,00

31,7500

1,2500

1.3/8

8

32,00

34,9250

1,3750

1.1/2

8

35,00

38,1000

1,5000

1.5/8

8

38,00

41,2750

1,6250

1.3/4

7

41,00

44,4500

1,7500

1.7/8

7

47,6250

1,8750

2

7

47,00

50,8000

2,0000