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ASME B18.22M Metric Plain Washers

ASME B18.22M Metric Plain Washers

Dimensions of Metric Plain Washers

Nominal Sizes Series A B C
Inside Diameter Outside Diameter Thickness
Max2 Min3 Max Min Max Min
1.6 Narrow 2.09 1.95 4.00 3.70 0.70 0.50
Regular 2.09 1.95 5.00 4.70 0.70 0.50
Wide 2.09 1.95 6.00 5.70 0.90 0.60
2 Narrow 2.64 2.50 5.00 4.70 0.90 0.60
Regular 2.64 2.50 6.00 5.70 0.90 0.60
Wide 2.64 2.50 8.00 7.64 0.90 0.60
2.5 Narrow 3.14 3.00 6.00 5.70 0.90 0.60
Regular 3.14 3.00 8.00 7.64 0.90 0.60
Wide 3.14 3.00 10.00 9.64 1.20 0.80
3 Narrow 3.68 3.50 7.00 6.64 0.90 0.60
Regular 3.68 3.50 10.00 9.64 1.20 0.80
Wide 3.68 3.50 12.00 11.57 1.40 1.00
3.5 Narrow 4.18 4.00 9.00 8.64 1.20 0.80
Regular 4.18 4.00 10.00 9.64 1.40 1.00
Wide 4.18 4.00 15.00 14.57 1.75 1.20
4 Narrow 4.88 4.70 10.00 9.64 1.20 0.80
Regular 4.88 4.70 12.00 11.57 1.40 1.00
Wide 4.88 4.70 16.00 15.57 2.30 1.60
5 Narrow 5.78 5.60 11.00 10.57 1.40 1.00
Regular 5.78 5.60 15.00 14.57 1.75 1.20
Wide 5.78 5.60 20.00 19.48 2.30 1.60
6 Narrow 6.87 6.65 13.00 12.57 1.75 1.20
Regular 6.87 6.65 18.80 18.28 1.75 1.20
Wide 6.87 6.65 25.40 24.88 2.30 1.60
8 Narrow 9.12 8.90 18.80 18.28 2.30 1.60
Regular 9.12 8.90 25.40 24.88 2.30 1.60
Wide 9.12 8.90 32.00 31.38 2.80 2.00
10 Narrow 11.12 10.85 20.00 19.48 2.30 1.60
Regular 11.12 10.85 28.00 27.48 2.80 2.00
Wide 11.12 10.85 39.00 38.38 3.50 2.50
12 Narrow 13.57 13.30 25.40 24.88 2.80 2.00
Regular 13.57 13.30 34.00 33.38 3.50 2.50
Wide 13.57 13.30 44.00 43.38 3.50 2.50
14 Narrow 15.52 15.25 28.00 27.48 2.80 2.00
Regular 15.52 15.25 39.00 38.38 3.50 2.50
Wide 15.52 15.25 50.00 49.38 4.00 3.00
16 Narrow 17.52 17.25 32.00 31.38 3.50 2.50
Regular 17.52 17.25 44.00 43.38 4.00 3.00
Wide 17.68 17.25 56.00 54.80 4.60 3.50
20 Narrow 22.13 21.80 39.00 38.38 4.00 3.00
Regular 22.13 21.80 50.00 49.00 4.60 3.50
Wide 22.13 21.80 66.00 64.80 5.10 4.00
24 Narrow 26.12 25.60 44.00 43.00 4.60 3.50
Regular 26.12 25.60 56.00 54.80 5.10 4.00
Wide 26.12 25.60 72.00 70.80 5.60 4.50
30 Narrow 33.02 32.40 56.00 54.80 5.10 4.00
Regular 33.02 32.40 72.00 70.80 5.60 4.50
Wide 33.02 32.40 90.00 88.60 6.40 5.00
36 Narrow 38.92 38.30 66.00 64.80 5.60 4.50
Regular 38.92 38.30 90.00 88.60 6.40 5.00
Wide 38.92 38.30 110.00 108.60 8.50 7.00

Note :

  • Nominal washers sizes are intended for use with comparable nominal screw or bolt sizes.
  • The 18.80/18.28 and 25.40/24.88 mm outside diameter avoid washers which could be used in coin operated devices.