Basic Fastener (External) Thread

Tolerance

Major Diameter

Pitch Diameter

Minor Diameter

Designation

Class

Max

Min

Max

Min

Max.

Min.

M1.6 × 0.35

6g

1.581

1.496

1.354

1.291

1.202

1.075

M1.6 × 0.35

4g6g

1.581

1.496

1.354

1.314

1.202

1.098

M2 × 0.4

6g

1.981

1.886

1.721

1.654

1.548

1.408

M2 × 0.4

4g6g

1.981

1.886

1.721

1.679

1.548

1.433

M2.5 × 0.45

6g

2.480

2.380

2.188

2.117

1.993

1.840

M2.5 × 0.45

4g6g

2.480

2.380

2.188

2.143

1.993

1.866

M3 × 0.5

6g

2.980

2.874

2.655

2.580

2.439

2.272

M3 × 0.5

4g6g

2.980

2.874

2.655

2.607

2.439

2.299

M3.5 × 0.6

6g

3.479

3.354

3.089

3.004

2.829

2.635

M3.5 × 0.6

4g6g

3.479

3.354

3.089

3.036

2.829

2.667

M4 × 0.7

6g

3.978

3.838

3.523

3.433

3.220

3.002

M4 × 0.7

4g6g

3.978

3.838

3.523

3.467

3.220

3.036

M5 × 0.8

6g

4.976

4.826

4.456

4.361

4.110

3.869

M5 × 0.8

4g6g

4.976

4.826

4.456

4.396

4.110

3.904

M6 × 1

6g

5.974

5.794

5.324

5.212

4.891

4.596

M6 × 1

4g6g

5.974

5.794

5.324

5.253

4.891

4.637

M8 × 1.25

6g

7.972

7.760

7.160

7.042

6.619

6.272

M8 × 1.25

4g6g

7.972

7.760

7.160

7.085

6.619

6.315

M8 × 1

6g

7.974

7.794

7.324

7.212

6.891

6.596

M8 × 1

4g6g

7.974

7.794

7.324

7.253

6.891

6.637

M10 × 1.5

6g

9.968

9.732

8.994

8.862

8.344

7.938

M10 × 1.5

4g6g

9.968

9.732

8.994

8.909

8.344

7.985

M10 × 1.25

6g

9.972

9.760

9.160

9.042

8.619

8.272

M10 × 1.25

4g6g

9.972

9.760

9.160

9.085

8.619

8.315

M10 × 0.75

6g

9.978

9.838

9.491

9.391

9.166

8.929

M10 × 0.75

4g6g

9.978

9.838

9.491

9.428

9.166

8.966

M12 × 1.75

6g

11.966

11.701

10.829

10.679

10.072

9.601

M12 × 1.75

4g6g

11.966

11.701

10.829

10.734

10.072

9.656

M12 × 1.5

6g

11.968

11.732

10.994

10.854

10.344

9.930

M12 × 1.25

6g

11.972

11.760

11.160

11.028

10.619

10.258

M12 × 1.25

4g6g

11.972

11.760

11.160

11.075

10.619

10.305

M12 × 1

6g

11.974

11.794

11.324

11.206

10.891

10.590

M12 × 1

4g6g

11.974

11.794

11.324

11.249

10.891

10.633

M14 × 2

6g

13.962

13.682

12.663

12.503

11.797

11.271

M14 × 2

4g6g

13.962

13.682

12.663

12.563

11.797

11.331

M14 × 1.5

6g

13.968

13.732

12.994

12.854

12.344

11.930

M14 × 1.5

4g6g

13.968

13.732

12.994

12.904

12.344

11.980

M15 × 1

6g

14.974

14.794

14.324

14.206

13.891

13.590

M15 × 1

4g6g

14.974

14.794

14.324

14.249

13.891

13.633

M16 × 2

6g

15.962

15.682

14.663

14.503

13.797

13.271

M16 × 2

4g6g

15.962

15.682

14.663

14.563

13.797

13.331

M16 × 1.5

6g

15.968

15.732

14.994

14.854

14.344

13.930

M16 × 1.5

4g6g

15.968

15.732

14.994

14.904

14.344

13.980

M17 × 1

6g

16.974

16.794

16.324

16.206

15.891

15.590

M17 × 1

4g6g

16.974

16.794

16.324

16.249

15.891

15.633

M18 × 1.5

6g

17.968

17.732

16.994

16.854

16.344

15.930

M18 × 1.5

4g6g

17.968

17.732

16.994

16.904

16.344

15.980