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常用美制統一細牙螺紋尺寸表(UNF)

時間:2020-12-29 09:18:59 點擊次數:

UNF螺紋 牙型角為60°     P=25.41/n     H=0.866025/n*25.4  ,螺紋表示為如5/818  UNF,是指 UNF的螺紋,規格為5/8寸,一寸長的螺紋上有18個牙型角 

公稱直徑

No.

牙數

螺距

牙高

大徑

中徑

小徑

No.0-80      UNF

No.1-72 UNF

80

0.3175

0.172

1.524

1.318

1.181

No.2-64      UNF


72

0.3528

0.191

1.854

1.626

1.473



64

0.3969

0.215

2.184

1.928

1.755

No.4-48      UNF

No.3-56 UNF

56

0.4536

0.246

2.515

2.22

2.024

No.5-44      UNF


48

0.5292

0.286

2.845

2.502

2.271



44

0.5773

0.312

3.175

2.709

2.551

No.6-40      UNF


40

0.635

0.344

3.505

3.094

2.817

No.8-36      UNF


36

0.7056

0.382

4.166

3.708

3.401

No.10-32     UNF


32

0.7938

0.43

4.826

4.31

3.967

1/4-28    UNF

No.12-28 UNF

28

0.9071

0.491

5.486

4.897

4.503

5/16-24     UNF


28

0.9071

0.491

6.35

5.761

5.367



24

1.0583

0.573

7.938

7.249

6.792

3/8-24    UNF


24

1.0583

0.573

9.525

8.837

8.379

7/16-20   UNF


20

1.27

0.687

11.112

10.287

9.738

1/2-20    UNF


20

1.27

0.687

12.7

11.874

11.326

9/16-18     UNF


18

1.4111

0.764

14.288

13.371

12.761

5/8-18    UNF


18

1.4111

0.764

15.875

14.958

14.348

3/4-16    UNF


16

1.5875

0.859

19.05

18.019

17.33

7/8-14    UNF


14

1.8143

0.982

22.225

21.046

20.262

1-12      UNF


12

2.1167

1.146

25.4

24.026

23.109

1-1/8-12  UNF


12

2.1167

1.146

28.575

27.201

26.284

1-1/4-12  UNF


12

2.1167

1.146

31.75

30.376

29.459

1-3/8-12  UNF


12

2.1167

1.146

34.925

33.551

32.634

1-1/2-12  UNF


12

2.1167

1.146

38.1

36.726

35.809


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