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GB/T 810-1988
Small round nuts(d≤M100)
Nom
P
dk
k
n max
n min
t max
t min
M10
1
20
6
4.3
4
2.6
2
M12
1.25
22
6
4.3
4
2.6
2
M14
1.5
25
6
4.3
4
2.6
2
M16
1.5
28
6
4.3
4
2.6
2
M18
1.5
30
6
5.3
5
3.1
2.5
M20
1.5
32
6
5.3
5
3.1
2.5
M22
1.5
35
8
5.3
5
3.1
2.5
M24
1.5
38
8
5.3
5
3.1
2.5
M27
1.5
42
8
5.3
5
3.1
2.5
M30
1.5
45
8
5.3
5
3.1
2.5
M33
1.5
48
8
5.3
5
3.1
2.5
M36
1.5
52
8
6.3
6
3.6
3
M39
1.5
55
8
6.3
6
3.6
3
M42
1.5
58
8
6.3
6
3.6
3
M45
1.5
62
8
6.3
6
3.6
3
M48
1.5
68
10
6.3
6
3.6
3
M52
1.5
72
10
8.36
8
4.25
3.5
M56
2
78
10
8.36
8
4.25
3.5
M60
2
80
10
8.36
8
4.25
3.5
M64
2
85
10
8.36
8
4.25
3.5
M68
2
90
10
8.36
8
4.25
3.5
M72
2
95
12
8.36
8
4.25
3.5
M76
2
100
12
10.36
10
4.75
4
M80
2
105
12
10.36
10
4.75
4
M85
2
110
12
10.36
10
4.75
4
M90
2
115
12
10.36
10
4.75
4
M95
2
120
12
10.36
10
4.75
4
M100
2
125
12
12.43
12
5.75
5
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