Size

API External Thread
in

Recommend Torque of Connection
kN.m

Bits Type
kN.m

in

mm

Series H

5 7/8

149.2

3 1/2

9.50-12.2

H136

6

152.4

H136\H126\H216\H537

6 1/4

158.75

H216

7 7/8

200

4 1/2

16.30-21.70

H217

8 1/2

215.9

H116\H117\H126\H127\H136\H137\H216\H437E\H437L\H517\H517E\H517L\H537\H537L\H617

8 3/8

212.7

H136、H126、H517

9 1/2

241.3

6 5/8

37.93-43.30

H116\H126\H437\H517\H517L\H537

12 1/4

311.2

H116\H126\H127\H136\H137\H216\H437\H447\H517\H527\H537\H637

Series HT

8 1/2

215.9

4 1/2

16.30-21.70

HT437\HT517

Series HD

8 1/2

215.9

4 1/2

16.30-21.70

HD437

Series HB

8 1/2

215.9

4 1/2

16.30-21.70

HB517

12 1/4

311.2

6 5/8

37.93-43.30

HB517

Series HA

5 7/8-6 1/2

149.2-165.1

3 1/2

9.50-12.2

HA217、HA417、HA437、HA437LHA537、HA517、HA527Y、HA617、HA637、HA617Y、HA617GL

7 7/8-8 3/8

200.0-212.7

4 1/2

16.30-21.70

9 1/2 12 1/4

241.3 311.2

6 5/8

37.93-43.30