Three Wire Measurement for Metric Threads

(60° Metric Thread)

M = PD + C       PD = M – C

 M = Measurement over wires

 PD = Pitch Diameter

 C = Constant

PITCH

BEST WIRE

CONSTANT

MM

INCHES

MM

INCHES

MM

INCHES

0.35

0.4

0.45

0.5

0.6

 

0.7

0.8

1.0

1.25

1.5

 

1.75

2.0

2.5

3.0

3.5

 

4.0

4.5

5.0

5.5

6.0

.01378

.01575

.01772

.01969

.02362

 

.02756

.03150

.03937

.04921

.05906

 

.06890

.07874

.09843

.11811

.13780

 

.15748

.17717

.19685

.21654

.23622

0.2021

0.2309

0.2598

0.2887

0.3464

 

0.4041

0.4619

0.5774

0.7217

0.8660

 

1.0104

1.1547

1.4434

1.7321

2.0207

 

2.3094

2.5981

2.8868

3.1754

3.4641

.00796

.00909

.01023

.01137

.01364

 

.01591

.01818

.02273

.02841

.03410

 

.03978

.04546

.05683

.06819

.07956

 

.09092

.10229

.11365

.12502

.13638

0.3031

0.3464

0.3897

0.4330

0.5196

 

0.6062

0.6928

0.8660

1.0815

1.2990

 

1.5155

1.7321

2.1651

2.5981

3.0311

 

3.4641

3.8971

4.3301

4.7631

5.1962

.01193

.01364

.01534

.01705

.02046

 

.02387

.02728

.03410

.04262

.05114

 

.05967

.06819

.08524

.10229

.11933

 

.13638

.15343

.17048

.18753

.20457

 

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