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American Metric Washers s ANSI B18.22M Size Table
Metric ISO Hardware Engineering Data
Inch ANSI Hardware Engineering Data
Fastener and Screw / Bolt Design, Formula & Calculations
Metric plain washers should be specified in the sequence : description, nominal size, series, material type, and finish, if required.
American Metric Washers ANSI B18.22M Size Table
American National Standard Metric Plain Washers
Washer
Sizea |
Washer
Series |
Inside Diameter
A |
Outside Diameter
B |
Thickness
C |
|||
---|---|---|---|---|---|---|---|
Max
|
Min
|
Max
|
Min
|
Max
|
Min
|
||
1.6
|
Narrow
Regular Wide |
2.09
2.09 2.09 |
1.95
1.95 1.95 |
4.00
5.00 6.00 |
3.70
4.70 5.70 |
0.70
0.70 0.90 |
0.50
0.50 0.60 |
2
|
Narrow
Regular Wide |
2.64
2.64 2.64 |
2.50
2.50 2.50 |
5.00
6.00 8.00 |
4.70
5.70 7.64 |
0.90
0.90 0.90 |
0.60
0.60 0.60 |
2.5
|
Narrow
Regular Wide |
3.14
3.14 3.14 |
3.00
3.00 3.00 |
6.00
8.00 10.00 |
5.70
7.64 9.64 |
0.90
0.90 1.20 |
0.60
0.60 0.80 |
3
|
Narrow
Regular Wide |
3.68
3.68 3.68 |
3.50
3.50 3.50 |
7.00
10.00 12.00 |
6.64
9.64 11.57 |
0.90
1.20 1.40 |
0.60
0.80 1.00 |
3.5
|
Narrow
Regular Wide |
4.18
4.18 4.18 |
4.00
4.00 4.00 |
9.00
10.00 15.00 |
8.64
9.64 14.57 |
1.20
1.40 1.75 |
0.80
1.00 1.20 |
4
|
Narrow
Regular Wide |
4.88
4.88 4.88 |
4.70
4.70 4.70 |
10.00
12.00 16.00 |
9.64
11.57 15.57 |
1.20
1.40 2.30 |
0.80
1.00 1.60 |
5
|
Narrow
Regular Wide |
5.78
5.78 5.78 |
5.50
5.50 5.50 |
11.00
15.00 20.00 |
10.57
14.57 19.48 |
1.40
1.75 2.30 |
1.00
1.20 1.60 |
6
|
Narrow
Regular Wide |
6.87
6.87 6.87 |
6.65
6.65 6.65 |
13.00
18.80 25.40 |
12.57
18.37 24.88 |
1.75
1.75 2.30 |
1.20
1.20 1.60 |
8
|
Narrow
Regular Wide |
9.12
9.12 9.12 |
8.90
8.90 8.90 |
18.80 b
25.40 b 32.00 |
18.37 b
24.48 b 31.38 |
2.30
2.30 2.80 |
1.60
1.60 2.00 |
10
|
Narrow
Regular Wide |
11.12
11.12 11.12 |
10.85
10.85 10.85 |
20.00
28.00 39.00 |
19.48
27.48 38.38 |
2.30
2.80 3.50 |
1.60
2.00 2.50 |
12
|
Narrow
Regular Wide |
13.57
13.57 13.57 |
13.30
13.30 13.30 |
25.40
34.00 44.00 |
24.88
33.38 43.38 |
2.80
3.50 3.50 |
2.00
2.50 2.50 |
14
|
Narrow
Regular Wide |
15.52
15.52 15.52 |
15.25
15.25 15.25 |
28.00
39.00 50.00 |
27.48 |
2.80
3.50 4.00 |
2.00
2.50 3.00 |
16
|
Narrow
Regular Wide |
17.52
17.52 17.52 |
17.25
17.25 17.25 |
32.00
44.00 56.00 |
31.38
43.38 54.80 |
3.50
4.00 4.60 |
2.50
3.00 3.50 |
20
|
Narrow
Regular Wide |
22.32
22.32 22.32 |
21.80
21.80 21.80 |
39.00
50.00 66.00 |
38.38
49.38 64.80 |
4.00
4.60 5.10 |
3.00
3.50 4.00 |
24
|
Narrow
Regular Wide |
26.12
26.12 26.12 |
25.60
25.60 25.60 |
44.00
56.00 72.00 |
43.38
54.80 70.80 |
4.60
5.10 5.60 |
3.50
4.00 4.50 |
30
|
Narrow
Regular Wide |
33.02
33.02 33.02 |
32.40
32.40 32.40 |
56.00
72.00 90.00 |
54.80
70.80 88.60 |
5.10
5.60 6.40 |
4.00
4.50 5.00 |
36
|
Narrow
Regular Wide |
38.92
38.92 38.92 |
38.30
38.30 38.30 |
66.00
90.00 110.00 |
64.80
88.60 108.60 |
5.60
6.40 8.50 |
4.50
5.00 7.00 |
a Nominal washer sizes are intended for use with comparable screw and bolt sizes.
b The 18.80 ⁄18.37 and 25.40 ⁄24.48 mm outside diameters avoid washers which could be used in coin-operated devices.
All dimensions are in millimeters.
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