钻铤螺纹 
型号

外径D

内径d

长度Lmm

台肩倒角直径

参考的弯曲强度比

mm

In

mm

in

NC31-41(2-7/8IF)

104.8

4-1/8

50.8

2

9150

100.4

2.43:1

NC35-47

120.7

4-3/4

50.8

2

9150

114.7

2.58:1

NC38-50(3-1/2IF)

127.0

5

57.2

2-1/4

9150

121.0

2.38:1

NC44-60

152.4

6

57.2

2-1/4

9150/9450

144.5

2.49:1

NC44-60

152.4

6

71.4

2-13/16

9150/9450

144.5

2.84:1

NC44-62

158.8

6-1/4

57.2

2-1/4

9150/9450

149.2

2.91:1

NC46-62(4IF)

158.8

6-1/4

71.4

2-13/16

9150/9450

150.0

2.63:1

NC46-65(4IF)

165.1

6-1/2

57.2

2-1/4

9150/9450

154.8

2.76:1

NC46-65(4IF)

165.1

6-1/2

71.4

2-13/16

9150/9450

154.8

3.05:1

NC46-67(4IF)

171.4

6-3/4

57.2

2-1/4

9150/9450

159.5

3.18:1

NC50-67(4-1/2IF)

171.4

6-3/4

71.4

2-13/16

9150/9450

159.5

2.37:1

NC50-70(4-1/2IF)

177.8

7

57.2

2-1/4

9150/9450

164.7

2.54:1

NC50-70(4-1/2IF)

177.8

7

71.4

2-13/16

9150/9450

164.7

2.73:1

NC50-72(4-1/2IF)

184.2

7-1/4

71.4

2-13/16

9150/9450

169.5

3.12:1

NC56-77

196.8

7-3/4

71.4

2-13/16

9150/9450

185.3

2.70:1

NC56-80

203.2

8

71.4

2-13/16

9150/9450

190.1

3.02:1

6-5/8REG

209.6

8-1/4

71.4

2-13/16

9150/9450

195.7

2.93:1

NC61-90

228.6

9

71.4

2-13/16

9150/9450

212.7

3.17:1

7-5/8REG

241.3

9-1/2

76.2

3

9150/9450

223.8

2.81:1

NC70-97

247.6

9-3/4

76.2

3

9150/9450

232.6

2.57:1

NC70-100

254.0

10

76.2

3

9150/9450

237.3

2.81:1