类

型

公称直径

数字型

接头外径

水

眼

螺纹种类

每寸牙数

锥

度

基面螺纹均直径

公接头

母接头

扣

型

螺纹小端外径

螺纹大端外径

扣

长

扣

型

螺纹始端外径

扩孔

直径

扣

长

英寸

D

d

2tgФ

C

Ds

Dl

Lpc

Qc

Lbc

数

字

型

NC23

4

1:6

59.817

52.400

65.100

76.2

59.83

66.7

92.1

NC35

89.687

79.096

94.971

95.2

89.69

96.8

111.11

NC44

112.192

98.425

117.475

114.3

112.2

119.1

130.2

NC56

1:4

142.646

117.500

149.250

127.0

143.98

150.8

142.9

NC61

156.921

128.600

163.525

139.7

158.25

165.1

155.6

NC70

179.146

147.650

185.750

152.4

180.48

187.3

168.3

NC77

196.621

161.950

203.200

165.1

197.93

204.8

181.0

正规

2 ³/₈

80

25.4

甲种

5

1:4

7°7´30″

60.080

2A31

47.625

66.675

76.2

2A30

61.423

68.3

92.1

2 ⁷/₈

95

32

69.605

231

53.975

76.200

88.9

230

70.948

77.8

104.8

3 ¹/₂

108

38

82.293

331

65.075

88.900

95.3

330

83.635

90.5

110.1

4 ¹/₂

140

58

113.800

431

90.475

117.475

108.0

430

112.211

119.1

123.8

5 ¹/₂

172

70

乙种

4

1:4

132.944

531

110.058

140.208

120.7

530

133.630

141.7

136.5

6 ⁵/₈

197

89

丙种

1:6

146.248

631

131.030

152.197

127.0

630

145.601

154.0

142.9

7 ⁵/₈

225

102

乙种

1:4

170.549

731

144.475

177.800

133.4

730

171.235

180.2

149.2

8 ⁵/₈

254

131

194.731

831

167.843

201.982

136.6

830

195.417

204.4

152.4

贯眼

2 ³/₈

64

36.5

甲种

5

1:4

64.059

2A21

51.604

70.654

76.2

2A20

65.402

72.3

92.1

2 ⁷/₈

108

54

85.480

221

69.850

92.075

88.9

220

86.823

94.5

104.8

3 ¹/₂

113

62

94.844

321

77.622

101.443

95.3

320

96.187

102.8

111.1

4

NC40

133

71

丁种

4

1:6

103.429

4A21

89.662

108.712

114.4

4A20

103.440

120.3

130.1

4 ¹/₂

146

80

甲种

5

1:4

115.113

421

96.317

121.717

101.6

420

116.456

123.8

117.5

5 ¹/₂

178

101

丙种

4

1:6

142.011

521

126.797

147.955

127.0

520

141.364

150.0

142.9

6 ⁵/₈

203

127

165.598

621

150.368

171.526

127.0

620

164.950

173.8

142.9

内平

2 ³/₈

NC26

86

44.5

丁种

4

1:6

4°45´48″

67.767

2A11

60.350

73.050

76.2

2A10

67.778

74.6

92.1

2 ⁷/₈

NC31

105

54

80.848

211

71.323

86.131

88.9

210

80.860

87.7

140.8

3 ¹/₂

NC38

121

68.3

96.723

311

85.065

102.006

101.6

310

96.734

103.6

117.5

4

NC46

146

82.6

117.500

4A11

103.734

122.734

114.4

4A10

117.511

124.6

130.2

4 ¹/₂

NC50

155

95.3

128.059

411

114.300

133.350

114.4

410

128.070

134.9

130.2

5 ¹/₂

185

122

157.201

511

141.326

162.484

127.0

510

137.212

163.9

142.9

6 ⁵/₈

212

145

184.173

611

168.260

189.456

127.0

610

184.186

192.0

142.9