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BS 4464 Rectangular Spring Washer
Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data
BS 4464, Single Coil Rectangular Spring Washer, Metric Series Types B and BP
BS 4464 Type B
BS 4464 Type BP
Dimensions in mm
|
Nominal size
and thread diametera d |
Inside
diameter d1 |
Width
b |
Thickness
s |
Outside
diameter d2 max. |
Radius
r max. |
k
(type BP only) |
|
|
max.
|
min.
|
||||||
|
M1.6
|
1.9
|
1.7
|
0.7 0.1
|
0.4 ±0.1
|
3.5
|
0.15
|
–
|
|---|---|---|---|---|---|---|---|
|
M2
|
2.3
|
2.1
|
0.9 0.1
|
0.5 ±0.1
|
4.3
|
0.15
|
–
|
|
(M2.2)
|
2.5
|
2.3
|
1.0 0.1
|
0.6 ±0.1
|
4.7
|
0.2
|
–
|
|
M2.5
|
2.8
|
2.6
|
1.0 0.1
|
0.6 ±0.1
|
5.0
|
0.2
|
–
|
|
M3
|
3.3
|
3.1
|
1.3 0.1
|
0.8 ±0.1
|
6.1
|
0.25
|
–
|
|
(M3.5)
|
3.8
|
3.6
|
1.3 0.1
|
0.8 ±0.1
|
6.6
|
0.25
|
0.15
|
|
M4
|
4.35
|
4.1
|
1.5 0.1
|
0.9 ±0.1
|
7.55
|
0.3
|
0.15
|
|
M5
|
5.35
|
5.1
|
1.8 0.1
|
1.2 ±0.1
|
9.15
|
0.4
|
0.15
|
|
M6
|
6.4
|
6.1
|
2.5 0.15
|
1.6 ±0.1
|
11.7
|
0.5
|
0.2
|
|
M8
|
8.55
|
8.2
|
3 0.15
|
2 ±0.1
|
14.85
|
0.65
|
0.3
|
|
M10
|
10.6
|
10.2
|
3.5 0.2
|
2.2 ±0.15
|
18.0
|
0.7
|
0.3
|
|
M12
|
12.6
|
12.2
|
4 0.2
|
2.5 ±0.15
|
21.0
|
0.8
|
0.4
|
|
(M14)
|
14.7
|
14.2
|
4.5 0.2
|
3 ±0.15
|
24.1
|
1.0
|
0.4
|
|
M16
|
16.9
|
16.3
|
5 0.2
|
3.5 ±0.2
|
27.3
|
1.15
|
0.4
|
|
(M18)
|
19.0
|
18.3
|
5 0.2
|
3.5 ±0.2
|
29.4
|
1.15
|
0.4
|
|
M20
|
21.1
|
20.3
|
6 0.2
|
4 ±0.2
|
33.5
|
1.3
|
0.4
|
|
(M22)
|
23.3
|
22.4
|
6 0.2
|
4 ±0.2
|
35.7
|
1.3
|
0.4
|
|
M24
|
25.3
|
24.4
|
7 0.25
|
5 ±0.2
|
39.8
|
1.65
|
0.5
|
|
(M27)
|
28.5
|
27.5
|
7 0.25
|
5 ±0.2
|
43.0
|
1.65
|
0.5
|
|
M30
|
31.5
|
30.5
|
8 0.25
|
6 ±0.25
|
48.0
|
2.0
|
0.8
|
|
(M33)
|
34.6
|
33.5
|
10 0.25
|
6 ±0.25
|
55.1
|
2.0
|
0.8
|
|
M36
|
37.6
|
36.5
|
10 0.25
|
6 ±0.25
|
58.1
|
2.0
|
0.8
|
|
(M39)
|
40.8
|
39.6
|
10 0.25
|
6 ±0.25
|
61.3
|
2.0
|
0.8
|
|
M42
|
43.8
|
42.6
|
12 0.25
|
7 ±0.25
|
68.3
|
2.3
|
0.8
|
|
(M45)
|
46.8
|
45.6
|
12 0.25
|
7 ±0.25
|
71.3
|
2.3
|
0.8
|
|
M48
|
50.0
|
48.8
|
12 0.25
|
7 ±0.25
|
74.5
|
2.3
|
0.8
|
|
(M52)
|
54.1
|
52.8
|
14 0.25
|
8 ±0.25
|
82.6
|
2.65
|
1.0
|
|
M56
|
58.1
|
56.8
|
14 0.25
|
8 ±0.25
|
86.6
|
2.65
|
1.0
|
|
(M60)
|
62.3
|
60.9
|
14 0.25
|
8 ±0.25
|
90.8
|
2.65
|
1.0
|
|
M64
|
66.3
|
64.9
|
14 0.25
|
8 ±0.25
|
93.8
|
2.65
|
1.0
|
|
(M68)
|
70.5
|
69.0
|
14 0.25
|
8 ±0.25
|
99.0
|
2.65
|
1.0
|
a Sizes shown in brackets are non-preferred, and are not usually stock sizes.
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