滾牙素材徑表

UNC美制粗螺紋/ UNC American coarse threading

尺寸
Size

牙數
Teeth

等級 Grade

3A

2A

1A

U N06

32

2.98 ~ 2.95

2.95 ~ 2.91

-

N08

32

3.64 ~ 3.61

3.60 ~ 3.57

-

NO10

24

4.12 ~ 4.09

4.09~ 4.05

-

N012

24

4.78 ~ 4.75

4.75 ~ 4.70

-

1/4

20

5.53 ~ 5.50

5.50 ~ 5.45

5.47 ~ 5.40

5/16

18

7.03 ~ 6.99

6.98 ~ 6.93

6.96~6.88

3/8

16

8.50 ~ 8.46

8.45 ~ 8.40

8.43~ 8.34

7/16

14

9.94 ~ 9.90

9.89~ 9.83

9.86~ 9.77

1/2

13

11.44 ~ 11.39

11.39 ~ 11.32

11.35 ~ 11.26

9/16

12

12.92~ 12.87

12.87~ 12.80

12.83 ~ 12.73

5/8

11

14.39~ 14.34

14.33 ~ 14.26

14.30~ 14.19

3/4

10

17.41 ~ 17.35

17.34~ 17.27

17.31 ~ 17.20

7/8

9

20.40 ~ 20.34

20.34 ~ 20.26

20.30~ 20.17

1

8

23.35 ~ 23.29

23.28 ~ 23.20

23.24 ~ 23.11

1~1/8

7

26.24 ~ 26.17

26.16 ~ 26.07

26.12 ~ 25.98

1~1/4

7

29.41 ~ 29.34

29.33 ~ 29.24

29.28~ 29.14

1~3/8

6

32.20 ~ 32.13

32.12 ~ 32.02

32.07 ~ 31.91

1~1/2

6

35.35 ~ 35.20

35.29 ~ 35.08

35.29 ~ 34.98

1~3/4

5

41.15 ~ 40.89

41.08 ~ 40.85

41.08 ~ 40.94

2

4~1/2

47.13 ~ 46.95

47.06 ~ 46.82

47.06~ 46.90


UNF美制細螺紋/ UNF American fine threading

尺寸
Size

牙數
Teeth

等級 Grade

3A

2A

1A

U NO6

40

3.08 ~ 3.06

3.05 ~ 3.02

-

NO8

36

3.69 ~ 3.67

3.66 ~ 3.63

-

NO10

32

4.29 ~ 4.26

4.26 ~ 4.22

-

NO12

28

4.88 ~ 4.85

4.84 ~ 4.80

-

1/4

28

5.75 ~ 5.72

5.72 ~ 5.68

5.70 ~ 5.63

5/16

24

7.24 ~ 7.21

7.20 ~ 7.16

7.18 ~ 7.11

3/8

24

8.83 ~ 8.79

8.79 ~ 8.74

8.76 ~ 8.69

7/16

20

10.28 ~ 10.24

10.23 ~ 10.18

10.21 ~ 10.13

1/2

20

11.86 ~ 11.82

11.82 ~ 11.76

11.79 ~ 11.71

9/16

18

11.36 ~ 11.32

13.31 ~ 13.25

13.28~ 13.19

5/8

18

14.94 ~ 14.90

14.89 ~ 14.83

14.86 ~ 14.77

3/4

16

18.00 ~ 17.96

17.9 5 ~ 17.89

17.92 ~ 17.82

7/8

14

21.03 ~ 20.98

20.98 ~ 20.91

20.94 ~ 20.84

1

12

24.01 ~ 2396

23.95 ~ 23.87

23.91 ~ 23.80

1~1/8

12

27.19~ 27.13

27.12 ~ 27.05

27.08 ~ 26.97

1~1/4

12

30.36 ~ 30.30

30.29 ~ 30.21

30.25 ~ 30.14

1~3/8

12

33.53 ~ 33.47

33.46 ~ 33.38

33.42 ~ 33.30

1~1/2

12

36.70 ~ 36.654

36.63 ~ 36.55

36.59 ~ 36.47



公制螺紋/ Metric threading

尺寸
Size

節距
Pitch

等級 Grade

1

2

3

M 3

0.5

2.66 ~ 2.64

2.63 ~ 2.60

~

3.5

0.6

3.10 ~ 3.08

3.06 ~ 3.03

3.05 ~ 3.00

4

0.7

3.54 ~ 3.51

3.49 ~ 3.45

~

4.5

0.75

4.01 ~ 3.98

3.96 ~ 3.92

3.94 ~ 3.88

5

0.8

4.47 ~ 4.44

4.43 ~ 4.38

4.40 ~ 4.33

6

1

5.34 ~ 5.3I

5.30 ~ 5.25

5.28 ~ 5.21

7

1

6.34 ~ 6.31

6.30 ~ 6.25

6.28 ~ 6.21

8

1.25

7.18 ~ 7.1 4

7.12 ~ 7.07

7.10 ~ 7.03

9

1.25

8.18 ~ 8.14

8.12 ~ 8.07

8.10 ~ 8.03

10

1.5

9.03 ~ 8.99

8.97 ~ 8.91

8.94~ 8.86

11

1.5

10.02~ 9.98

9.97~ 9.91

9.94 ~ 9.86

12

1.75

10.86 ~ 10.82

10.79~ 10.73

10.77 ~ 10.69

14

2

12.70~ 12.65

12.63 ~ 12.56

12.61~ 12.52

16

2

14.70 ~ 14.65

14.63 ~ 14.56

14.61~ 14.52

18

2.5

16.38~ 16.33

16.31~ 16.28

16.28 ~ 16.17

20

2.5

18.38 ~ 18.33

18.31 ~ 18.23

18.28~ 18.17

22

2.5

20.38 ~ 20.33

20.31 ~ 20.23

20.28 ~ 20.17

24

3

22.07 ~ 22.01

21.98~ 21.90

21.96~ 21.85

27

3

25.06 ~ 25.00

24.98 ~ 24.89

24.95 ~ 24.84

30

3.5

27.75~ 27.68

27.66 ~ 27.56

27.63 ~ 27.50

33

3.5

30.74 ~ 30.68

30.65~ 30.56

30.62 ~ 30.50

36

4

33.43 ~ 33.37

33.33 ~ 33.23

33.29 ~ 33.16

39

4

36.43 ~ 36.36

36.32 ~ 36.22

36.27 ~ 36.11

42

4.5

39.11 ~ 39.04

39.01 ~ 38.90

38.97 ~ 38.82

45

4.5

42.11 ~ 42.04

42.00 ~ 41.90

41.96 ~ 41.82

48

5

44.75 ~ 44.60

44.68 ~ 44.45

41.68 ~ 44.37



BSW英制粗螺紋/ BSW Inch threading

尺寸
Size

等級 Grade

2

3

4

W 3/16 ~ 24

4.08~ 4.05

4.06~ 4.02

4.04~3.97

1/4 ~ 20

5.51 ~ 5.46

5.49~ 5.42

5.47 ~ 5.38

5/16~ 18

7.01 ~ 6.95

6.99~ 6.91

6.97~6.87

3/8 ~ 16

8.48~ 8.41

8.46~ 8.37

8.44 ~ 8.33

7/16~ 14

9.92 ~ 9.85

9.90~ 9.81

9.87 ~ 9.76

1/2 ~ 12

11.31 ~ 11.24

11.29 ~ 11.19

11.27 ~ 11.15

9/16~ 12

12.89~ 12.82

12.87~ 12.77

12.85 ~ 12.72

5/8 ~ 11

14.36~ 14.29

14.34~ 14.24

14.31~ 14.18

3/4 ~ 10

17.38 ~ 17.30

17.36 ~ 17.25

17.33 ~ 17.19

7/8 ~ 9

20.38 ~ 20.29

20.34 ~ 20.23

20.32 ~ 20.18

1 ~ 8

23.32 ~ 23.23

23.29~ 23.17

23.26 ~ 23.11



管用螺紋/ Pipe threading

尺寸
Size

P              F

PS

       P                   T

A

B

基準勁位置
Std.
dia.
pos.

素材徑
Raw material dia.

1/8 ~ 28

9.10 ~ 9.05

9.05v8.94

9.00 ~ 892

3.97

9.16 ~ 9. 10

1/4 ~ 19

12.25 ~ 12.19

12.19 ~ 12.07

12.11 ~ 12.01

6.01

12.32 ~ 12.23

3/8 ~ 19

17.76 ~ 15.69

15.69 ~ 15.57

15.61 ~ 15.51

6.35

15.82 ~ 15.73

1/2 ~ 14

19.74~ 19.67

19.67 ~ 19.53

19.55 ~ 19.43

8.16

19.81 ~ 19.70

3/4 ~ 14

25.22~ 25.15

25.15 ~ 25.01

25.03 ~ 24.90

9.53

25.29 ~ 25.18

1 ~ 11

31.70~ 31.61

31.61 ~ 31.43

31.47 ~ 31.34

10.39

31.79 ~ 31.64