Related Resources: hardware

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.

Metric Washer

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
38.38
49.38

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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