Thread Code

Rec Min. Sheet Thickness

C
-.005

H
Nom.

B
±.005

Hole size In Sheet
+.003

440

.040

.165

.187

.125

.166

6440

.040

.212

.250

.125

.213

632

.040

.212

.250

.156

.213

8632

.050

.280

.312

.156

.281

832

.050

.280

.312

.188

.281

032

.050

.280

.312

.203

.281

Thread Code

Rec Min. Sheet Thickness

C
-0.13

H
Nom.

B
±0.13

Hole size In Sheet
+0.08

M2.5

1.02

4.2

4.75

3.0

4.22

M3

1.02

4.2

4.75

3.2

4.22

3.5M3

1.02

5.39

6.35

3.2

5.41

M3.5

1.02

5.39

6.35

3.9

5.41

M4

1.27

5.98

7.0

4.8

6.0

3.5M4

1.27

7.12

8.0

4.8

7.14

M5

1.27

7.12

8.0

5.35

7.14

M6

1.3

8.72

10.0

6.4

8.75

UNIFIED

Thread Size

Type

Thread Code

Length "L" +.002 -.005 (Length code is in 32ths of an inch )

Min.Dist Hole C/L To Edge

Steel

Stainless Steel

Aluminum

.125

.187

.250

.312

.375

.437

.500

.562

.625

.687

.750

.812

.875

.112-40(#4-40)

SO

SOS

SOA

440

4

6

8

10

12

14

16

18

20

22

/

/

/

0.23

6440

0.27

.138-32(#6-32)

SO

SOS

SOA

632

4

6

8

10

12

14

16

18

20

22

24

26

28

0.27

8632

0.31

.164-32(#8-32)

SO

SOS

SOA

832

4

6

8

10

12

14

16

18

20

22

24

26

28

0.31

.190-32(#10-32)

SO

SOS

SOA

032

4

6

8

10

12

14

16

18

20

22

24

26

28

0.31

D Dimension ±.010

None

.187

.312

.437

METRIC

Thread Size

Type

Thread Code

Length "L" +0.05 -0.13 (Length Code is in millimeters )

Min.Dist Hole C/L To Edge

Steel

Stainless Steel

Aluminum

M2.5X0.45

SO

SOS

SOA

M2.5

3

4

6

8

10

12

14

16

18

/

/

/

/

6

M3X0.5

SO

SOS

SOA

M3

3

4

6

8

10

12

14

16

18

/

/

/

/

6

3.5M3

6.8

M3.5X0.6

SO

SOS

SOA

M3.5

3

4

6

8

10

12

14

16

18

/

/

/

/

6.8

M4X0.7

SO

SOS

SOA

M4

3

4

6

8

10

12

14

16

18

20

22

25

/

7.5

3.5M4

8

M5X0.8

SO

SOS

SOA

M5

3

4

6

8

10

12

14

16

18

20

22

25

/

8

M6X1.0

SO

SOS

SOA

M6

3

4

6

8

10

12

14

16

18

20

22

25

/

9

D Dimension ±0.25

None

4

8

11