API and H-90 connections 285 to 341 BHN hardness Drill spiral Collar cold rolled Pressed steel thread protectors

Number and connection table

Outside Diameter

Inside Diameter

Length
mm

Bevel
Diameter
mm

Bending
Strength
Ratio

mm

in

mm

in

NC23-31

79.4

3 1/8

31.8

1 1/2

9150

76.2

2.57:1

NC26-35(2 3/8 IF)

88.9

3 1/2

38.1

1 1/2

9150

82.9

2.42:1

NC31-41(2 7/8 IF)

104.8

4 1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.6

4 3/4

50.8

2

9150

114.7

2.58:1

NC38-50(31/2IF)

127

5

57.2

2 1/4

9150

121

2.38:1

NC44-60

152.4

6

57.2

2 1/4

9150 or 9450

144.5

2.49:1

NC44-60

152.4

6

71.4

2 13/16

9150 or 9450

144.5

2.84:1

NC44-62

158.8

6 1/4

57.2

2 1/4

9150 or 9450

149.2

2.91:1

NC44-62(4IF)

158.8

6 1/2

71.4

2 13/16

9150 or 9450

150

2.63:1

NC44-65(4IF)

165.1

6 1/2

57.2

2 1/4

9150 or 9450

154.8

2.76:1

NC44-65(4IF)

165.1

6 1/2

71.4

2 13/16

9150 or 9450

154.8

3.05:1

NC44-67(4IF)

171.4

6 3/4

57.2

2 1/4

9150 or 9450

159.5

3.18:1

NC50-67(41/2IF)

171.4

6 3/4

71.4

2 13/16

9150 or 9450

159.5

2.37:1

NC50-70(41/2IF)

177.8

7

57.2

2 1/4

9150 or 9450

164.7

2.54:1

NC50-70(41/2IF)

177.8

7

71.4

2 13/16

9150 or 9450

164.7

2.73:1

NC50-72(41/2IF)

184.2

7 1/4

71.4

2 13/16

9150 or 9450

169.5

3.12:1

NC56-77

196.8

7 3/4

71.4

2 13/16

9150 or 9450

185.3

2.70:1

NC56-80

203.2

8

71.4

2 13/16

9150 or 9450

190.1

3.02:1

6 5/8 REG

209.6

8 1/4

71.4

2 13/16

9150 or 9450

195.7

2.93:1

NC61-90

228.6

9

71.4

2 13/16

9150 or 9450

212.7

3.17:1

7 5/8 REG

241.3

9 1/2

76.2

3

9150 or 9450

223.8

2.81:1

NC70-97

247.6

9 3/4

76.2

3

9150 or 9450

232.6

2.57:1

NC70-100

254

10

76.2

3

9150 or 9450

237.3

2.81:1

8 5/8 REG

279.4

11

76.2

3

9150 or 9450

266.7

2.84:1

Slips and elevator grooves can be produced upon the customers' requirement.