PF螺纹的基本尺寸　　　　　　　　　　　　　　　　　　　　　mm

螺纹尺寸代号

牙数

n

螺距

P

牙高

h

基  准  平  面

大径

d，D

中径

d₂，D₂

小径

d₁，D₁

PF1/8

28

0.907 1

0.581

9.728

9.147

8.566

PF1/4

19

1.336 8

0.856

13.157

12.301

11.445

PF3/8

19

1.336 8

0.856

16.662

15.806

14.950

PF1/2

14

1.814 3

1.162

20.955

19.793

18.631

PF5/8

14

1.814 3

1.162

22.911

21.749

20.587

PF3/4

14

1.814 3

1.162

26.441

25.279

24.117

PF7/8

14

1.814 3

1.162

30.201

29.039

27.877

PF1

11

2.309 1

1.479

33.249

31.770

30.291

PF1¹/₈

11

2.309 1

1.479

37.897

36.418

34.939

PF1¹/₄

11

2.309 1

1.479

41.910

40.431

38.952

PF1¹/₂

11

2.309 1

1.479

47.803

46.324

44.845

PF1³/₄

11

2.309 1

1.479

53.746

52.267

50.788

PF2

11

2.309 1

1.479

59.614

58.135

56.656

PF2¹/₄

11

2.309 1

1.479

65.710

64.231

62.752

PF2¹/₂

11

2.309 1

1.479

75.184

73.705

72.226

PF2³/₄

11

2.309 1

1.479

81.534

80.055

78.576

PF3

11

2.309 1

1.479

87.884

86.405

84.926

PF3¹/₂

11

2.309 1

1.479

100.330

98.851

97.372

PF4

11

2.309 1

1.479

113.030

111.551

110.072

PF4¹/₂

11

2.309 1

1.479

125.730

124.251

122.772

PF5

11

2.309 1

1.479

138.430

136.951

135.472

PF5¹/₂

11

2.309 1

1.479

151.130

149.651

148.172

PF6

11

2.309 1

1.479

163.830

162.351

160.872

PF7

11

2.309 1

1.479

189.230

187.751

186.272

PF8

11

2.309 1

1.479

214.630

213.151

211.672

PF9

11

2.309 1

1.479

240.030

238.551

237.072

PF10

11

2.309 1

1.479

265.430

263.951

262.472

PF12

11

2.309 1

1.479

316.230

314.751

313.272