Washer Standards
|
Nominal Bolt Size
|
Inside Diameter
|
Outside Diameter
|
Thickness
|
||||
|
|
Min
|
Max
|
Min
|
Max
|
Nom
|
Min
|
Max
|
|
M5
|
5.5
|
5.8
|
12.0
|
12.7
|
1.4
|
1.2
|
1.6
|
|
M6
|
6.7
|
7.1
|
16.0
|
17.0
|
1.4
|
1.2
|
1.6
|
|
M8
|
8.8
|
9.3
|
19.0
|
20.0
|
1.6
|
1.4
|
1.8
|
|
M10
|
10.5
|
11.0
|
22.5
|
23.5
|
2.0
|
1.8
|
2.2
|
|
7/16"
|
12.0
|
12.7
|
25.4
|
26.5
|
2.0
|
1.8
|
2.2
|
|
M12
|
13.2
|
14.0
|
27.5
|
28.5
|
2.25
|
2.0
|
2.5
|
|
M16
|
17.2
|
18.0
|
33.5
|
34.5
|
2.75
|
2.5
|
3.0
|
|
M20
|
21.0
|
22.0
|
38.0
|
39.5
|
3.0
|
2.6
|
3.2
|
|
7/8"
|
23.5
|
24.5
|
46.5
|
48.0
|
3.0
|
2.8
|
3.5
|
|
M24
|
26.0
|
27.0
|
52.0
|
54.2
|
4.0
|
3.5
|
4.2
|
|
1 1/8"
|
31.0
|
32.5
|
62.0
|
64.0
|
4.0
|
3.5
|
4.2
|
|
M30
|
33.0
|
34.5
|
58.0
|
60.0
|
4.0
|
3.5
|
4.2
|
|
1 1/4"
|
35.0
|
36.5
|
68.0
|
66.0
|
4.0
|
3.5
|
4.2
|
|
M36
|
39.0
|
40.5
|
70.0
|
73.0
|
5.0
|
4.5
|
5.2
|
|
1 1/2"
|
41.0
|
43.0
|
77.0
|
80.0
|
5.0
|
4.8
|
5.5
|
|
M42
|
45.0
|
46.0
|
77.0
|
80.0
|
5.0
|
4.8
|
5.2
|
|
1 3/4"
|
48.0
|
51.0
|
90.0
|
93.0
|
6.0
|
5.6
|
6.4
|
|
M48
|
51.0
|
53.5
|
90.0
|
93.0
|
6.0
|
5.6
|
6.4
|
|
2"
|
54.0
|
55.0
|
100.0
|
105.0
|
6.0
|
5.6
|
6.4
|
|
M56
|
61.5
|
63.0
|
118.0
|
125.0
|
7.0
|
6.6
|
7.4
|
|
M64
|
69.5
|
71.0
|
118.0
|
125.0
|
7.0
|
6.6
|
7.4
|
Information provided as a guide by Bremick Fasteners