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BS 4464-1-1969
Type A metric series single coil square section spring washers Table 1
Nom
d max
d min
b max
b min
h max
h min
dc max
H max
H min
Φ3
3.3
3.1
1.1
0.9
1.1
0.9
5.5
2.15
1.85
Φ3.5
3.8
3.6
1.1
0.9
1.1
0.9
6
2.15
1.85
Φ4
4.35
4.1
1.3
1.1
1.3
1.1
6.95
2.55
2.25
Φ5
5.35
5.1
1.6
1.4
1.6
1.4
8.55
3.15
2.85
Φ6
6.4
6.1
1.6
1.4
1.6
1.4
9.6
3.15
2.85
Φ8
8.55
8.2
2.1
1.9
2.1
1.9
12.75
4.15
3.85
Φ10
10.6
10.2
2.65
2.35
2.65
2.35
15.9
5.15
4.85
Φ12
12.6
12.2
2.65
2.35
2.65
2.35
17.9
5.15
4.85
Φ14
14.7
14.2
3.2
2.8
3.2
2.8
21.1
6.15
5.85
Φ16
16.9
16.3
3.7
3.3
3.7
3.3
24.3
7.15
6.85
Φ18
19
18.3
3.7
3.3
3.7
3.3
26.4
7.15
6.85
Φ20
21.1
20.3
4.7
4.3
4.7
4.3
30.5
9.15
8.85
Φ22
23.3
22.4
4.7
4.3
4.7
4.3
32.7
9.15
8.85
Φ24
25.3
24.4
5.2
4.8
5.2
4.8
35.7
10.15
9.85
Φ27
28.5
27.5
5.2
4.8
5.2
4.8
38.9
10.15
9.85
Φ30
31.5
30.5
6.2
5.8
6.2
5.8
43.9
12.15
11.85
Φ33
34.6
33.5
6.2
5.8
6.2
5.8
47
12.15
11.85
Φ36
37.6
36.5
7.25
6.75
7.25
6.75
52.1
14.15
13.85
Φ39
40.8
39.6
7.25
6.75
7.25
6.75
55.3
14.15
13.85
Φ42
43.8
42.6
8.25
7.75
8.25
7.75
60.3
16.15
15.85
Φ45
46.8
45.6
8.25
7.75
8.25
7.75
63.3
16.15
15.85
Φ48
50
48.8
8.25
7.75
8.25
7.75
66.5
16.15
15.85
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