Standard Metric Slotted Hex Nuts ANSI B18.2.4.4M

Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data

All dimensions are in millimeters.

ANSI B18.2.4.4M American National Standard Metric Slotted Hex Nuts

ANSI B18.2.4.4M American National Standard Metric Slotted Hex Nuts

Nominal Nut
Dia.
and
Thread
Pitch
Width Across
Flats,
S
Width Across
Corners,
E
Thickness,
M
Bearing
Face
Dia.,
Dw
Unslotted
Thickness,
F
Width of Slot,
N
Washer Face
Thickness
C
Max
Min
Max
Min
Max
Min
Min
Max
Min
Max
Min
Max
Min
M5 × 0.8
8.00
7.78
9.24
8.79
5.10
4.80
6.9
3.2
2.9
2.0
1.4
M6 × 1
10.00
9.78
11.55
11.05
5.70
5.40
8.9
3.5
3.2
2.4
1.8
M8 × 1.25
13.00
12.73
15.01
14.38
7.50
7.14
11.6
4.4
4.1
2.9
2.3
* M10 × 1.5
15.00
14.73
17.32
16.64
10.0
9.6
13.6
5.7
5.4
3.4
2.8
0.6
0.3
M10 × 1.5
16.00
15.73
18.48
17.77
9.30
8.94
14.6
5.2
4.9
3.4
2.8
M12 × 1.75
18.00
17.73
20.78
20.03
12.00
11.57
16.6
7.3
6.9
4.0
3.2
M14 × 2
21.00
20.67
24.25
23.35
14.10
13.40
19.6
8.6
8.0
4.3
3.5
M16 × 2
24.00
23.67
27.71
26.75
16.40
15.70
22.5
9.9
9.3
5.3
4.5
M20 × 2.5
30.00
29.16
34.64
32.95
20.30
19.00
27.7
13.3
12.2
5.7
4.5
0.8
0.4
M24 × 3
36.00
35.00
41.57
39.55
23.90
22.60
33.2
15.4
14.3
6.7
5.5
0.8
0.4
M30 × 3.5
46.00
45.00
53.12
50.85
28.60
27.30
42.7
18.1
16.8
8.5
7.0
0.8
0.4
M36 × 4
55.00
53.80
63.51
60.79
34.70
33.10
51.1
23.7
22.4
8.5
7.0
0.8
0.4

* This size with width across flats of 15 mm is not standard. Unless specifically ordered, M10 slotted hex nuts with 16 mm width across flats will be furnished.

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