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BS 4464 Split Coil Washer

Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data

BS 4464 Split Coil Washer Spring Metric Series Type A

BS 4464 Split Coil Washer Spring Metric Series Type A

All dimensions in mm.

a Sizes shown in brackets are non-preferred and are not usually stock sizes

Nominal size
and thread
diametera
d
Inside
diameter d1
Thickness
and
width s
Outside
diameter
d2
max.
Radius
r
max.
max.
min.
M3
3.3
3.1
1 ±0.1
5.5
0.3
(M3.5)
3.8
3.6
1± 0.1
6.0
0.3
M4
4.35
4.1
1.2 ±0.1
6.95
0.4
M5
5.35
5.1
1.5 ±0.1
8.55
0.5
M6
6.4
6.1
1.5 ±0.1
9.6
0.5
M8
8.55
8.2
2 ±0.1
12.75
0.65
M10
10.6
10.2
2.5 ±0.15
15.9
0.8
M12
12.6
12.2
2.5 ±0.15
17.9
0.8
(M14)
14.7
14.2
3 ±0.2
21.1
1.0
M16
16.9
16.3
3.5 ±0.2
24.3
1.15
(M18)
19.0
18.3
3.5 ±0.2
26.4
1.15
M20
21.1
20.3
4.5 ±0.2
30.5
1.5
(M22)
23.3
22.4
4.5 ±0.2
32.7
1.5
M24
25.3
24.4
5 ±0.2
35.7
1.65
(M27)
28.5
27.5
5 ±0.2
38.9
1.65
M30
31.5
30.5
6 ±0.2
43.9
2.0
(M33)
34.6
33.5
6 ±0.2
47.0
2.0
M36
37.6
36.5
7 ±0.25
52.1
2.3
(M39)
40.8
39.6
7 ±0.25
55.3
2.3
M42
43.8
42.6
8 ±0.25
60.3
2.65
(M45)
46.8
45.6
8 ±0.25
63.3
2.65
M48
50.0
48.8
8 ±0.25
66.5
2.65
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