Specification

Minimum length

Bore diameter
Qb

Bearing surface width 
B 
mm

Weight

OD 
d 
mm

OD 
W 
mm

Short coupling 
NL

Long 
Coupling 
NL

Short coupling

Long 
Coupling

1

2

3

4

5

6

7

8

9

4-1/2

114.30

127.00

158.75

177.80

116.68

3.97

3.62

4.15

5

127.00

141.30

165.10

196.85

129.38

4.76

4.66

5.75

5-1/2

139.70

153.67

171.45

203.20

142.08

3.18

5.23

6.42

6-5/8

168.28

187.71

184.15

222.25

170.66

6.35

9.12

11.34

7

177.80

194.46

184.15

228.60

180.18

4.76

8.39

10.83

7-5/8

193.70

215.90

190.50

234.95

197.64

5.56

12.30

15.63

8-5/8

219.08

244.48

196.85

254.00

223.04

6.35

16.23

21.67

9-5/8

24.48

269.88

196.85

266.70

248.44

6.35

18.03

25.45

10-3/4

273.05

298.45

203.20

_

277.02

6.35

20.78

_

11-3/4

298.45

323.85

203.20

_

302.42

6.35

22.64

_

13-3/8

339.72

365.12

203.20

_

343.69

5.56

25.66

_

16

406.40

431.80

228.60

_

411.96

5.56

34.91

__

18-5/8

473.08

508.00

228.60

_

478.63

5.56

54.01

_

20

508.00

228.60

228.60

292.10

513.56

5.56

43.42

57.04

The tolerance of the outer diameter of 1, 2 and 3 W ± 1%, but not more than ± 3.18mm. 
Group 4 OD W tolerance of ± 1% but not more than ±3.18 , -1.59mm. 
A coupling specifications and code and the corresponding pipe specification 
B for all groups, the bore diameter tolerances of Q ++0.790 mm