Half-Lock Nuts
A hexagon nut, half the height of a normal nut, typically used for locking a normal nut. Also called a jam nut or thin nut.
M
Pitch
 
s
 
e
 
M1.6
M2
0.35
0.40
3.20-3.02
4.00-3.82
1.00-0.75
1.20-0.95
M2.3
0.40
4.50-4.32
1.60-1.35
M2.5
0.45
5.00-4.82
1.60-1.35
M2.6
0.45
5.00-4.82
1.60-1.35
M3
0.50
5.50-5.32
M3.5
0.60
6.00-5.82
1.80-1.55
2.00-1.75
M4
0.70
7.00-6.78
2.20-1.95
M5
0.80
8.00-7.78
2.70-2.45
1.00
M6
10.00-9.78
3.20-2.90
M8
1.25
13.00-12.73
4.00-3.70
M10
1.50
17.00-15.73
5.00-4.70
M12
1.75
19.00-17.73
6.00-5.70
8.00-7.42
M14
2.00
22.00-20.67
7.00-6.42
M16
2.00
24.00-23.67
M18
2.50
27.00-26.16
9.00-8.42
M20
2.50
30.00-29.16
10.00-9.10
M22
2.50
32.00-31.00
11.00-9.90
M24
3.00
36.00-35.00
12.00-10.90
M27
3.00
41.00-40.00
13.50-12.40
M30
3.50
46.00-45.00
15.00-13.90
M33
3.50
50.00-49.00
16.50-15.40
M36
4.00
55.00-53.80
M39
4.00
60.00-58.80
19.50-18.20
18.00-16.90
M42
4.50
65.00-63.10
21.00-19.70
M45
4.50
70.00-67.10
22.50-21.20
M48
5.00
75.00-73.10
24.00-22.70
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