HEX NIPPLE

HEX NIPPLE

BS3799-1974

hex nipple BS3799 Forged Steel Fittings

Dimensions in Millimeters

Norminal size

A
(min)

W
(min)

E
(min)

B(1)

C
(min)

F
(min)

Equal

Reducing

In

DN

In

DN

3M(2)

6M(2)

1/8

6

11

26

10

5

2

6

-

1/4

8

15

36

15

8

6

6

-

1/4 x 1/8

8 x 6

15

31

15

5

2

6

10

3/8

10

18

40

16

11

8

8

-

3/8 x 1/4

10 x 8

18

39

16

8

6

8

15

1/2

15

22

48

14

11

8

-

-

1/2 x 3’8

15 x 10

22

44

20

11

8

8

16

1/2 x 1/4

15 x 8

22

43

20

8

6

8

15

3/4  

20

27

52

21

19

1.3

10

-

3/4 x 1/2

20 x 15

27

50

21

14

9

20

-

3/4 x 3/8

20 x 109

27

46

21

11

6

9

16

1

25

32

60

25

24

17

10

-

1 x 3/4

25 x 20

35

56

25

19

13

10

21

1 x 1/2

25 x 15

35

55

25

14

11

10

20

14/2

40

50

68

26

38

30

16

-

1-1/2 x 1

40 x 25

50

67

26

24

17

16

25

1-1/2 x 3/4

40 x 20

50

63

26

19

13

16

21

1-1/2 x 1/2

40 x 15

50

62

26

14

11

16

20

2

50

71

27

39

17

-

-

-

2 x 1-7/2

50 x 40

70

27

30

17

25

-

-

2 x 1

50 x 25

70

27

17

17

18

25

-

2 x 3/4

50 x 20

65

27

13

17

21

-

-

2 x 1/2  

50 x 15

65

27

11

18

20

-

-

(1) Tolerance see page 21.

(2) 3M & 6M symbols denote 3000 & 6000 classes

DIMENSIONAL TOLERANCE OF BS3799
8S3799-1974 (Unit : mm)

Item

Type of pipe fitting

DN

6-8

10-20

25-50

65-80

NPS

1/8"--114"

3181-314"

1 "-2"

2-1/2"-3"

Concentricity of bore (X)

All fillings

±0_ 8

Coincidence of axes 061

± I 1200

Bore diameter of fitting (b)

Boss & Hex Nipple

±0.4

a-0.8

Bottom of socket to opposite face

Boss

±0,8

±1.5

±2.0

±2.5