Metric Washer Charts

Diameters & thickness expressed in millimeters  ​​

Metric Form B Flat Washer 

Metric Form A Flat Washer 

Metric Form C Flat Washer 

 Inside Diameter
 5.3
6. 4
8.4
10.5
13
15
17
19
21
23
25
28
31
34
37
40
 
 
  Outside Diameter  
10
12.5
17
21
24
28
30
34
37
39
44
50
56
60
66
72
 
   
Thickness
0.8
0.8
1.0
1.25
1.25
1.6
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
 

 Inside Diameter 
4.2
5.3
6.4
8.4
10.5
13
15
17
19
21
25
 
 
  Outside Diameter 
10
12.5
14.0
21
24
28
30
34
37
39
50
 
 
   
Thickness 
0.8
1.0
1.6
1.6
2.0
2.5
2.5
3.0
3.0
3.0
4.0
 
 
Size 
M1
M1.2
M1.4
M1.6
M1.7
M2
M2.3
M2.5
M2.6
M3
M3.5
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39
M42
M45
M48
M52
M55
M56
M58
M60
M64
M68
M72
M76
M80
M85
M90
M95
M100
 ​​
 Inside Diameter
1.1
1.3
1.5
1.7
1.8
2.2
2.5
2.7
2.8
3.2
3.7
4.3
5.3
6.4
7.4
8.4
10.5
13
15
17
19
21
23
25
28
31
34
37
40
43
46
50
54
57
58
60
62
66
70
74
78
82
87
93
98
104
 
  Outside Diameter 
3
3.5
4
4
4.5
5
6
6
7
7
8
9
10
12
14
16
20
24
28
30
34
37
39
44
50
56
60
6
72
78
85
92
98
105
105
110
110
115
120
125
135
140
145
160
165
175
 
   
Thickness
0.3
0.3
0.3
0.3
0.3
0.3
0.5
0.5
0.5
0.5
0.5
0.8
1
1.6
1.6
1.6
2
2.5
2.5
3
3
3
3
4
4
4
5
5
6
7
7
8
8
9
9
9
9
9
10
10
10
12
12
12
12
14

 
Size 
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39
 
 ​​
 
Size 
M4
M5
M6
M8
M10
M12
M14
M16
M18
M20
M24
 

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