Square Head Nut

Thread Size

M5

M6

M8

M10

M12

M16

M20

Pitch

0.8

1

1.25

1.5

1.75

2

2.5

H

max

4.6

5.6

7.25

8.75

10.75

13.9

16.9

min

3.4

4.4

5.75

7.25

9.25

12.1

15.1

F  

11.3

14.1

18.4

22.6

25.4

33.9

42.4

G

max

8

10

13

16

18

24

30

min

7.64

9.64

12.57

15.57

17.57

23

29.16

Thread Size

1/4"

5/16"

3/8"

7/16"

1/2"

5/8"

3/4"

7/8"

1"

1-1/8"

1-1/4"

1-3/8"

1-1/2"

Pitch

20

20

20

16

13

16

16

12

12

7

H

basis

1/4"

5/16"

3/8"

7/16"

1/2"

5/8"

3/4"

7/8"

1"

1-1/8"

1-1/4"

1-3/8"

1-1/2"

max

0.266

0.33

0.393

0.456

0.52

0.647

0.774

0.901

1.028

1.155

1.282

1.409

1.536

min

0.218

0.28

0.341

0.403

0.464

0.587

0.71

0.833

0.956

1.079

1.187

1.31

1.433

F  

basis

7/16"

9/16"

11/16"

3/4"

7/8"

1-1/16"

1-1/4"

1-7/16"

1-5/8"

1-13/16"

2"

2-3/16"

2-3/8"

max

0.5

0.562

0.688

0.75

0.872

1.062

1.25

1.438

1.625

1.812

2

2.188

2.375

min

0.488

0.546

0.669

0.728

0.85

1.031

1.212

1.394

1.575

1.756

1.938

2.119

2.3

G

max

0.707

0.795

0.973

1.06

1.237

1.503

1.768

2.033

2.298

2.563

2.828

3.094

3.359

min

0.64

0.72

0.889

0.97

1.137

1.386

1.635

1.884

2.132

2.381

2.631

2.879

3.128

Standards :

DIN557

ANSI/ASMEB18.2

ISO, BS , JIS B 1181, GB/T 6170,GB/T6171,GB/T6177 and Non-standard .

Mechanical  Properties:

4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9

2, 5, 8 10

Surface Treatment:

Plain, Bule/White/Yellow Zinc, Black , Black Zinc, Mechanical Zinc,   Hot Dip Galvanized, Nickel and Dacro.

Sizes:

Dimension :1.6mm--160mm ; 4#-4"