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

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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