Related Resources: hardware
Metric Hex Nuts ANSI/ASME B18.2.4.1M and B18.2.4.2M
Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data
All dimensions are in millimeters.
American National Standard Metric Hex Nuts, Styles 1 and 2
ANSI/ASME B18.2.4.1M and B18.2.4.2M
|
Metric Hex Nuts — Style 1
|
|||||||||
|
Nominal Nut Dia.
and Thread Pitch |
Width Across
Flats, S |
Width Across
Corners, E |
Thickness,
M |
Bearing Face
Dia., Dw |
Washer Face
Thickness, C |
||||
|
Max
|
Min
|
Max
|
Min
|
Max
|
Min
|
Min
|
Max
|
Min
|
|
|
M1.6 × 0.35
|
3.20
|
3.02
|
3.70
|
3.41
|
1.30
|
1.05
|
2.3
|
…
|
…
|
|---|---|---|---|---|---|---|---|---|---|
|
M2 × 0.4
|
4.00
|
3.82
|
4.62
|
4.32
|
1.60
|
1.35
|
3.1
|
…
|
…
|
|
M2.5 × 0.45
|
5.00
|
4.82
|
5.77
|
5.45
|
2.00
|
1.75
|
4.1
|
…
|
…
|
|
M3 × 0.5
|
5.50
|
5.32
|
6.35
|
6.01
|
2.40
|
2.15
|
4.6
|
…
|
…
|
|
M3.5 × 0.6
|
6.00
|
5.82
|
6.93
|
6.58
|
2.80
|
2.55
|
5.1
|
…
|
…
|
|
M4 × 0.7
|
7.00
|
6.78
|
8.08
|
7.66
|
3.20
|
2.90
|
6.0
|
…
|
…
|
|
M5 × 0.8
|
8.00
|
7.78
|
9.24
|
8.79
|
4.70
|
4.40
|
7.0
|
…
|
…
|
|
M6 × 1
|
10.00
|
9.78
|
11.55
|
11.05
|
5.20
|
4.90
|
8.9
|
…
|
…
|
|
M8 × 1.25
|
13.00
|
12.73
|
15.01
|
14.38
|
6.80
|
6.44
|
11.6
|
…
|
…
|
|
M10 × 1.5
|
15.00
|
14.73
|
17.32
|
16.64
|
9.1
|
8.7
|
13.6
|
0.6
|
0.3
|
|
M10 × 1.5
|
16.00
|
15.73
|
18.48
|
17.77
|
8.40
|
8.04
|
14.6
|
…
|
…
|
|
M12 × 1.75
|
18.00
|
17.73
|
20.78
|
20.03
|
10.80
|
10.37
|
16.6
|
…
|
…
|
|
M14 × 2
|
21.00
|
20.67
|
24.25
|
23.36
|
12.80
|
12.10
|
19.4
|
…
|
…
|
|
M16 × 2
|
24.00
|
23.67
|
27.71
|
26.75
|
14.80
|
14.10
|
22.4
|
…
|
…
|
|
M20 × 2.5
|
30.00
|
29.16
|
34.64
|
32.95
|
18.00
|
16.90
|
27.9
|
0.8
|
0.4
|
|
M24 × 3
|
36.00
|
35.00
|
41.57
|
39.55
|
21.50
|
20.20
|
32.5
|
0.8
|
0.4
|
|
M30 × 3.5
|
46.00
|
45.00
|
53.12
|
50.85
|
25.60
|
24.30
|
42.5
|
0.8
|
0.4
|
|
M36 × 4
|
55.00
|
53.80
|
63.51
|
60.79
|
31.00
|
29.40
|
50.8
|
0.8
|
0.4
|
|
Metric Hex Nuts — Style 2
|
|||||||||
|
M3 × 0.5
|
5.50
|
5.32
|
6.35
|
6.01
|
2.90
|
2.65
|
4.6
|
…
|
…
|
|
M3.5 × 0.6
|
6.00
|
5.82
|
6.93
|
6.58
|
3.30
|
3.00
|
5.1
|
…
|
…
|
|
M4 × 0.7
|
7.00
|
6.78
|
8.08
|
7.66
|
3.80
|
3.50
|
5.9
|
…
|
…
|
|
M5 × 0.8
|
8.00
|
7.78
|
9.24
|
8.79
|
5.10
|
4.80
|
6.9
|
…
|
…
|
|
M6 × 1
|
10.00
|
9.78
|
11.55
|
11.05
|
5.70
|
5.40
|
8.9
|
…
|
…
|
|
M8 × 1.25
|
13.00
|
12.73
|
15.01
|
14.38
|
7.50
|
7.14
|
11.6
|
…
|
…
|
|
M10 × 1.5
|
15.00
|
14.73
|
17.32
|
16.64
|
10.0
|
9.6
|
13.6
|
0.6
|
0.3
|
|
M10 × 1.5
|
16.00
|
15.73
|
18.48
|
17.77
|
9.30
|
8.94
|
14.6
|
…
|
…
|
|
M12 × 1.75
|
18.00
|
17.73
|
20.78
|
20.03
|
12.00
|
11.57
|
16.6
|
…
|
…
|
|
M14 × 2
|
21.00
|
20.67
|
24.25
|
23.35
|
14.10
|
13.40
|
19.6
|
…
|
…
|
|
M16 × 2
|
24.00
|
23.67
|
27.71
|
26.75
|
16.40
|
15.70
|
22.5
|
…
|
…
|
|
M20 × 2.5
|
30.00
|
29.16
|
34.64
|
32.95
|
20.30
|
19.00
|
27.7
|
0.8
|
0.4
|
|
M24 × 3
|
36.00
|
35.00
|
41.57
|
39.55
|
23.90
|
22.60
|
33.2
|
0.8
|
0.4
|
|
M30 × 3.5
|
46.00
|
45.00
|
53.12
|
50.85
|
28.60
|
27.30
|
42.7
|
0.8
|
0.4
|
|
M36 × 4
|
55.00
|
53.80
|
63.51
|
60.79
|
34.70
|
33.10
|
51.1
|
0.8
|
0.4
|
All dimensions are in millimeters.
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