Technical Information..

 

Size

To mm

TPI

Inch metric

TPI

Inch metric

TPI

Inch metric

TPI

Inch Metric

No. 1

1.854

 

 

 

 

64

.016 0.397

72

.014 0.353

No. 2

2.184

 

 

 

 

56

.018 0.454

64

.016 0.397

No. 3

2.515

 

 

 

 

46

.021 0.529

56

.018 0.454

No. 4

2.845

 

 

 

 

40

.025 0.635

48

.021 0.529

No. 5

3.175

 

 

 

 

40

.025 0.635

44

.023 0.577

No. 6

3.505

 

 

 

 

32

.031 0.794

40

.025 0.635

No. 8

4.166

 

 

 

 

32

.031 0.794

36

.028 0.706

No. 10

4.826

 

 

 

 

24

.041 1.058

32

.031 0.794

No. 12

5.486

 

 

 

 

24

.41 1.058

28

.036 0.907

1/8”

3.175

40

.025 0.635

 

 

 

 

 

 

3/16”

4.762

24

.41 1.058

32

.031 0.794

 

 

 

 

¼”

6.350

20

.050 1.270

26

.038 .0977

20

.050 1.270

28

.036 0.907

5/15”

7.936

18

.055 1.411

22

0.45 1.154

18

.055 1.411

24

.041 1.058

3/8”

9.525

16

0.62 1.588

20

.050 1.270

16

.062 1.588

24

.041 1.058

7/16”

11.112

14

.071 1.814

18

.055 1.411

14

.071 1.814

20

.050 1.270

½”

12.700

12

.083 2.117

16

.062 1.588

13

.077 1.954

20

.050 1.270

9/16”

14.288

12

.083 2.117

16

.062 1.588

12

.083 2.117

18

.55 1.411

5/8”

15.875

11

.091 2.309

14

.071 1.814

11

.091 2.309

18

.055  1.411

11/16”

17.462

11

.091 2.309

14

.071 1.814

 

 

 

 

¾”

18.050

10

.100 2.540

12

.083 2.117

10

.100 2.544

16

.058 1.688

7/8”

22.225

9

.111 2.822

12

.091 2.309

9

.111 2.822

14

.071 1.814

1”

25.400

6

.125 3.175

10

.100 2.540

8

.125 3.175

12

.083 2.117

1.1/8”

28.575

7

.143 3.269

9

.111 2.872

7

.143 3.629

12

.083 2.117

3.4”

31.750

7

.143 3.629

9

.111 2.872

7

.143 3.629

12

.083 2.117

7/8”

34.925

6

.166 4.233

8

.125 3.175

6

.166 4.233

12

.083 2.117

1.1/2”

38.100

6

.166 4.233

8

.125 3.175

6

.166 4.233

12

.033 2.117

1.5/8”

41.275

5

.200 5.080

8

.125 3.175

 

 

 

 

1.3/4”

44.450

5

.200 5.080

7

.143 3.629

5

.200 5.080

 

 

2”

50.800

4.5

.222 5.644

7

.143 3.6239

4.5

.222 5.644

 

 

2.1/4”

57.150

4

.250 6.350

6

.166 4.233

4.5

.222 5.644

 

 

2.1/2”

63.500

4

.250 6.350

6

.166 4.233

4

.250 6.350

 

 

2.3/4”

69.850

3.5

.285 7.257

6

.166 4.233

4

.250 6.350

 

 

3”

76.200

3.5

.285 7.257

5

.200 5.080

4

.250 6.350

 

 

3.1/2”

88.900

3.25

.308 7.832

 

 

 

 

 

 

4”

101.600

3

.333 8.458

 

 

 

 

 

 

5”

127.000

2.75

.363 9.220

 

 

 

 

 

 

6”

152.400

2.5

.400 10.160

 

 

 

 

 

 

 

READING THEORY IN PITCH & TPI 1mm to 150 mm DIA

BASIC DIA

PITCH

TPI

 

BASIC DIA

PITCH

TPI

1
1.4
1.6
1.8

0.25
0.3
0.35
0.35

101.6
84.6
72.6
72.6

 

27
30
33
36

3
3.5
3.5
4

8.4
7.2
7.2
6.3

2
2.2
2.3
2.5

0.4
0.45
0.45
0.45

63.5
56.4
56.4
56.4

 

39
42
45
48

4
4.5
4.5
5

6.3
5.6
5.6
5.1

2.6
3
3.5
4

0.45
0.5
0.6
0.7

56.4
50.8
42.3
36.2

 

52
56
60
64

5
5.5
5.5
6

5.1
4.6
4.6
4.2

4.5
5
6
7

0.75
0.8
1
1

33.8
31.7
25.4
25.4

 

68
72
76
80

6
6
6
6

4.2
4.2
4.2
4.2

8
9
10
11

1.25
1.25
1.5
1.5

20.3
20.3
16.9
16.9

 

85
90
95
100

6
6
6
66

4.2
4.2
4.2
4.2

12
14
16
18

1.75
2
2
2.5

14.5
12.7
12.7
10.1

 

105
110
115
120

6
6
6
6

4.2
4.2
4.2
4.2

20
22
24
25

2.5
2.5
3
3

10.1
10.1
8.4
8.4

 

125
130
140
150

6
6
6
6

4.2
4.2
4.2
4.2

 

 

SELECTION FOR SERVICE CONDITION

SERVICE
CONDITION

STUD
BOLTS

NUTS

WORKING
TEMPERATURE

High Pressure
High Temperature

ASTM A 193 Gr.
B 6
B 7
B 7 M
B 16

ASTM A 194
6
2 H
2 HM
4 or 7

 

0 – 480 C
50 – 450

50 - 450

High Temperature
High corrosive

ASTM A 193 Gr. B 8
B 8 M
B 8 T

ASTM A 194 Gr. 8
8 M
8 T

540 – 800
540 – 800
540 – 800

High Pressure
Low Temperature

ASTM A 320 Gr. L 7

ASTM A 194 Gr. 4 TO 7

100 - 50

Low Temperature

ASTM A 320 Gr. B 8
B 8 M
B 8 T

ASTM A 194 Gr. 8
8 M
8 T

250 – 100
250 – 100
250 - 100

 








 

CHEMICAL REQUIREMENTS :-

GRADE

MATERIAL

CARBON

MANFANSE

PHOSPHORUS

SULPHUR

SILICON

CHROMIUM

NICKEL

MOLYBDENUM

TITANIUM

VANADIUM

2.2HM& 2H

Carbon

0.40 min

1.00 ,ax

0.040 max

0.50 max

0.40 max

 

 

 

 

 

4

Carbon molyb-denum

0.40-0.50

0.70-0.90

0.035 max

0.40 max

0.15-0.35

 

 

0.20-0.30

 

 

6

AISI-4140
4142/
4145
4140H
4142H
4145H

0.37-0.49

0.65

0.04 max

0.04 max

0.15.0.35

0.75-1.20 max

 

0.15-0.25

 

 

B8/B8A

AISI 304

0.08 max

2.00 max

0.045 max

0.030 max

1.00 max

18.00-20.00

8.00-10.50

 

 

 

B8M/BMA

AISI 316

0.08 max

2.00 max

0.045 max

0.030 max

1.00 max

16.00-18.00

10.00-14.00

2.00-3.00

 

 

B8T/B8TA

AISI 321

0.08 max

2.00 max

0.045 max

0.030 max

1.00 max

17.00-19.00

9.00-12.00

 

5 x Carbon content min

 

B16

 

0.36-0.44

0.45-0.70

0.035 max

0.040 max

0.15-0.35

0.80-1.15

 

0.50-0.65

 

 

B7

 

0.38-0.48

0.75-1.00

0.035 max

0.040 max

0.15-0.35

0.80-1.10

 

0.15-0.25

 

 

 

MECHANICAL REQUIREMENTS

 

STUDBOLTS – GRADES

NUT - GRADES

 

B7

B7M

B6

B8

B8M

B8T

B16

L7

2H

2HM

G4

G7

G6

G8

8M

8T

UTS kg/mm (min)

87.9

70.3

77.3

52.7

52.7

52.7

87.9

87.9

 

 

 

 

 

 

 

 

Yeild stress kg/mm(min)

73.8

50.2

59.8

21.1

21.1

21.1

73.8

73.8

 

 

 

 

 

 

 

 

Elongation % min

16.0

18.0

15.0

30.1

30.1

30

18

16

 

 

 

 

 

30

30

30

Reduction Area & min

50.0

50.0

50.0

50.0

50.0

50

50

50

 

 

 

 

 

50

50

50

Hardness

 

99HRB max

 

9535 max

95.5 max

95.5 max

 

 

24-38 HRC

22 HRC max

24-38 HRC

24-38 HRC

20-38 HRC

65-105 HRB

65-105 HRB

65-105 HRB