Castle Nuts
Used with cotter pins to prevent loosening, a castellated nut, also called a castle or slotted nut, is a nut with slots cut into the top. Used in low-torque applications such as holding a wheel bearing in place.
M5
M6
0.80
1.00
4.00-3.70
5.00-4.70
22.00-21.48
3.00
M27
M8
1.25
6.50-6.14
M10
1.50
8.00-7.64
M12
1.75
10.00-9.64
M14
2.00
11.00-10.57
M18
2.50
15.00-14.57
M20
2.50
16.00-15.57
M24
3.00
19.00-18.48
Pitch
 
w
 
M
M16
2.00
13.00-12.57
M30
3.50
24.00-23.48
29.00-28.48
4.00
M36
m
 
6.00-5.70
7.50-7.14
9.50-9.14
12.00-11.57
15.00-14.57
16.00-15.57
19.00-18.48
21.00-20.16
22.00-21.16
27.00-26.16
30.00-29.16
33.00-32.00
38.00-37.00
s
 
8.00-7.78
10.00-9.78
13.00-12.73
17.00-16.73
19.00-18.67
22.00-21.67
24.00-23.67
27.00-26.16
30.00-29.16
36.00-35.00
41.00-40.00
46.00-45.00
55.00-53.80
de
 
-
-
-
-
17.00-16.57
19.00-18.48
22.00-21.48
25.00-24.30
28.00-27.30
34.00-33.00
38.00-37.00
42.00-41.00
50.00-49.00
n
 
1.65-1.40
2.25-2.00
2.75-2.50
3.05-2.80
3.80-3.50
3.80-3.50
4.80-4.50
4.80-4.50
4.80-4.50
5.80-5.50
5.80-5.50
7.36-7.00
7.36-7.00
DIN 94
 
1.2x12
1.6x14
2.0x16
2.5x20
3.2x22
3.2x25
4.0x28
4.0x32
4.0x36
5.0x40
5.0x45
6.3x50
6.3x63
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