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7

Conversion and Reference Charts

Technical

Info

2015 Copyright Gardner-Westcott Company 10110 Six Mile Road Northville, Michigan 48168-9426

Call us toll-free at 1-800-521-9805 or (248)-305-5100 Fax (800)-871-5110 Shop on line at http://www.gardner-westcott.com

Metric Conversion Chart

Millimeters

Inches

1/4

5/16

3/8

1/2

5/8

3/4

1

1-3/16

1-3/8

1-9/16

1-3/4

2

2-3/16

2-3/8

2-9/16

2-3/4

3

3-3/16

3-3/8

3-1/2

4

4-3/8

4-3/4

6mm

8mm

10mm

12mm

16mm

20mm

25mm

30mm

35mm

40mm

45mm

50mm

55mm

60mm

65mm

70mm

75mm

80mm

85mm

90mm

100mm

110mm

120mm

American Equivalents

Fraction

Decimal

Millimeter

1/64

1/32

3/64

1/16

5/64

3/32

7/64

1/8

9/64

5/32

11/64

3/16

13/64

7/32

15/64

1/4

17/64

9/32

19/64

5/16

21/64

11/32

23/64

3/8

25/64

13/32

27/64

7/16

29/64

15/32

31/64

1/2

33/64

17/32

35/64

9/16

37/64

19/32

39/64

5/8

41/64

21/32

43/64

11/16

45/64

23/32

47/64

3/4

49/64

25/32

51/64

13/16

53/64

27/32

55/64

7/8

57/64

29/32

59/64

15/16

61/64

31/32

63/64

1"

.0156

.0312

.0468

.0625

.0781

.0937

.1093

.1250

.1406

.1562

.1718

.1875

.2031

.2187

.2343

.250

.2656

.2812

.2968

.3125

.3281

.34375

.3593

.375

.3906

.4062

.4218

.4375

.4531

.4687

.4843

.500

.5156

.5312

.5468

.5625

.5781

.5937

.6093

.625

.6406

.6562

.6718

.6875

.7031

.7187

.7343

.750

.7656

.7812

.7968

.8125

.8281

.8437

.8593

.8750

.8906

.9062

.9218

.9275

.9531

.9687

.9843

1.000

0.397

0.794

1.191

1.588

1.984

2.381

2.778

3.175

3.572

3.969

4.366

4.763

5.159

5.556

5.953

6.350

6.747

7.144

7.541

7.938

8.334

8.731

9.128

9.525

9.922

10.319

10.716

11.113

11.509

11.906

12.303

12.700

13.097

13.494

13.891

14.288

14.684

15.081

15.478

15.875

16.272

16.669

17.066

17.463

17.859

18.256

18.653

19.050

19.447

19.844

20.241

20.638

21.034

21.431

21.828

22.225

22.622

23.019

23.416

23.813

24.209

24.606

25.003

25.400

Threads Pitches Metric

Pitch

Diameter

6mm

8mm

8mm Fine

10mm

10mm Fine

12mm

12mm Fine

14mm

14mm Fine

1.0

1.25

1.0

1.50

1.25

1.75

1.50

2.0

1.50

Fine

Coarse

10/24

1/4-20

5/16-18

3/8-16

7/16-14

1/2-13

9/16-12

5/8-11

3/4-10

10/32

1/4-28

5/16-24

3/8-24

7/16-20

1/2-20

9/16-18

5/8-18

3/4-16

Threads Per Inch American