Cap Nuts

The cap nut, also known as the acorn nut or dome nut, gets its name from its shape. The nut has a domed top to prevent contact with the external thread.

Diameter
(d)
Pitch
 
s
 
 
h (max)
 
M3
M4
0.50
0.70
5.50-5.28
7.00-6.78
2.40-2.10
3.20-2.90
6.00
8.00
M5
0.80
8.00-7.78
4.00-3.70
10.00
M6
1.00
10.00-9.78
5.00-4.70
12.00
M7
1.00
10.00-9.78
5.00-4.70
12.00
2.00
22.00-21.67
11.00-10.30
25.00
M16
2.00
24.00-23.67
28.00
M8
1.25
13.00-12.73
6.50-6.14
M10
1.50
17.00-16.73
8.00-7.64
15.00
18.00
M12
1.75
19.00-18.73
10.00-9.64
22.00
M14
13.00-12.30
M18
2.50
27.00-26.67
15.00-14.30
32.00
M20
2.50
30.00-29.67
16.00-14.90
34.00
M27
3.00
41.00-40.38
22.00-20.70
47.00
M30
3.50
46.00-45.38
52.00
M24
3.00
36.00-35.38
19.00-17.70
M22
2.50
32.00-31.38
18.00-16.90
39.00
42.00
24.00-22.70
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