​丝锥用底孔钻头直径表

准备攻丝的螺纹

钻头规格代码

(最接近的英制分数规格)

英制小数规格

0-80UNF

3/64"

3/64"

.0469

1-64UNC

#53

-

.0595

1-72UNF

#53

1/16"

.0595

2-56UNC

#50

-

.0700

2-64UNF

#50

-

.0700

3-48UNC

#47

5/64"

.0785

3-56UNF

#45

-

.0820

4-36UNS

#44

-

.0860

4-40UNC

#43

3/32"

.0890

4-48UNF

#42

3/32"

.0935

M3×0.60

2.5mm

-

.0984

1/8-40UNS

#38

-

.1015

5-40UNC

#38

-

.1015

5-44UNF

#37

-

.1040

6-32UNC

#35

7/64"

.1100

6-36UNS

#34

-

.1110

6-40UNF

#33

-

.1130

6-48UNS

#31

-

.1200

M4×0.70

3.4mm

-

.1338

M4×0.75

3.4mm

-

.1338

8-32UNC

#29

-

.1360

8-36UNF

#29

9/64"

.1360

8-40UNS

#28

-

.1405

3/16"-24UNS

#26

-

.1470

10-24UNC

#25

5/32"

.1495

3/16"-32UNS

#22

-

.1570

10-32UNF

#21

5/32"

.1590

M5×0.90

4.2mm

-

.1653

M5×0.80

4.3mm

-

.1693

12-24UNC

#16

11/64"

.1770

12-28UNF

#14

3/16"

.1820

12-32NEF

#13

-

.1850

14-20UNS

#10

-

.1935

1/4"-20UNC

#7

13/64"

.2010

14-24UNS

#7

-

.2010

M6×1.00

5.2mm

-

.2047

1/4"-24UNS

#4

-

.2090

1/4"-28UNF

#3

7/32"

.2130

1/4"-32NEF

7/32"

7/32"

.2188

1/4"-40UNS

#1

-

.2280

M7×1.00

6.1mm

15/64"

.2401

5/16"-18UNC

字母F

17/64"

.2570

M8×1.25

6.9mm

17/64"

.2716

5/16"-24UNF

字母I

-

.2720

M8×1.00

7.1mm

-

.2795

5/16"-32NEF

9/32"

9/32"

.2812

M9×1.2

7.9mm

-

.3110

3/8"-16UNC

5/16"

5/16"

.3125

M9×0.75

8.3mm

-

.3268

M9×1.00

8.1mm

-

.3189

*该螺纹仅用于火花塞

准备攻丝的螺纹

钻头规格代码

(最接近的英制分数规格)

英制小数规格

3/8"-24UNF

字母Q

21/64"

.3320

M10×1.50

8.7mm

-

.3425

M10×1.25

8.9mm

11/32"

.3503

M10×1.00*

9.1mm

-

.3583

7/16"-14UNC

字母U

23/64"

.3680

M11×1.50

9.7mm

-

.3818

7/16"-20UNF

25/64"

25/64"

.3906

M12×1.75

10.5mm

-

.4133

M12×1.50

10.7mm

27/64"

.4212

1/2"-13UNC

27/64"

27/64"

.4219

M12×1.25*

10.9mm

27/64"

.4291

1/2"-20UNF

29/64"

29/64"

.4531

1/2"-24UNS

29/64"

29/64"

.4531

M14×2.00

12.2mm

-

.4803

9/16"-12UNC

31/64"

31/64"

.4844

M14×1.50

12.7mm

-

.4999

M14×1.25*

12.8mm

-

.5039

9/16"-18UNF

33/64"

33/64"

.5156

5/8"-11UNC

17/32"

17/32"

.5312

M16×2.00

14.2mm

35/64"

.5590

5/8"-18UNF

37/64"

37/64"

.5781

M16×1.50

14.7mm

-

.5787

11/16"-11UNS

19/32"

19/32"

.5938

M18×2.50

15.8mm

39/64"

.5220

11/16"-16UNS

5/8"

5/8"

.6250

3/4"-10UNC

21/32"

21/32"

.6562

M18×1.50*

16.8mm

-

.6614

3/4"-16UNF

11/16"

11/16"

.6875

M20×2.50

17.8mm

11/16"

.7008

7/8"-9UNC

49/64"

49/64"

.7656

7/8"-14UNF

13/16"

13/16"

.8125

M22×1.50

20.9mm

-

.8228

7/8"-18UNS*

53/64"

53/64"

.8281

M24×3.00

21.4mm

53/64"

.8425

1"-8UNC

7/8"

7/8"

.8750

M24×2.00

22.3mm

-

.8779

1"-12UNF

59/64"

59/64"

.9219

1"-14UNS

15/16"

15/16"

.9375

1¹/₈"-7      UNC

63/64"

63/64"

.9844

1¹/₈"-12      UNF

1³/₆₄"

1³/₆₄"

1.0469

1¹/₄"-7      UNC

1⁷/₆₄"

1⁷/₆₄"

1.1094

1¹/₄"-12      UNF

1¹¹/₆₄"

1¹¹/₆₄"

1.1719

1³/₈"-6      UNC

1⁷/₃₂"

1⁷/₃₂"

1.2188

1³/₈"-12      UNF

1¹⁹/₆₄"

1^19/₆₄^"

1.2969

1¹/₂"-6      UNC

1¹¹/₃₂"

1¹¹/₃₂"

1.3438

1¹/₂"-12      UNF

1²⁷/₆₄"

1²⁷/₆₄"

1.4219