ASME B18.22M Metric Plain Washers

ASME B18.22M Metric Plain Washers

Dimensions of ASME B18.22M Metric Plain Washers

Nominal Washer Size3 Washers 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

18.40b

25.40b

32.00

18.37b

24.48b

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

  • Nominal washers sizes are intended for use with comparable screw and bolt sizes.
  • 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.