• Preferred sizes are for the most part from series previously designated "Standard Plate" and "SAE." Where common sizes existed in the two series, the SAE size is designated "N" (narrow) and the Standard Plate "W" (wide). These sizes as well as all other sizes of Type A Plain Washers are to be ordered by ID, OD and thickness dimensions.
  • Nominal washer sizes are intended for use with comparable nominal screw or bolt sizes.
  • The 0.734 in., 1.156 in. and 1.469 in. outside diameters avoid washers which could be used in coin operated devices.
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Unit of Measure
Items
Plain Washers

Type A Plain Washer, 0.078" I.D.
Plain Washers

Type A Plain Washer, 0.094" I.D.
Plain Washers

Type A Plain Washer, 0.125" I.D.
Plain Washers

Type A Plain Washer, 0.156" I.D.
Plain Washers

Type A Plain Washer, 0.188" I.D.
Manufacturer N/A Industrial Fasteners Institute
Product N/A Washers
Codes and Standards N/A ASME B18.22.1 1965 (R1998)
Unit of Measure N/A English
Nominal Washer Size N/A N/A N/A N/A No. 6 N/A No. 8
Nominal Washer Size (Decimal) N/A N/A N/A N/A 0.1380 in N/A 0.1640 in
Standard Plate Size N/A
Basic Inside Diameter (A) N/A 0.078 in N/A 0.094 in N/A 0.125 in N/A 0.156 in N/A 0.188 in
Tolerance for Inside Diameter (A) N/A +0.000 in-0.005 in N/A +0.000 in-0.005 in N/A +0.008 in-0.005 in N/A +0.008 in-0.005 in N/A +0.008 in-0.005 in
Basic Outside Diameter (B) N/A 0.188 in N/A 0.250 in N/A 0.312 in N/A 0.375 in N/A 0.438 in
Tolerance for Outside Diameter (B) N/A +0.000 in-0.005 in N/A +0.000 in-0.005 in N/A +0.008 in-0.005 in N/A +0.015 in-0.005 in N/A +0.015 in-0.005 in
Basic Thickness (C) N/A 0.020 in N/A 0.020 in N/A 0.032 in N/A 0.049 in N/A 0.049 in
Max. Thickness (C) N/A 0.025 in N/A 0.025 in N/A 0.040 in N/A 0.065 in N/A 0.065 in
Min. Thickness (C) N/A 0.016 in N/A 0.016 in N/A 0.025 in N/A 0.036 in N/A 0.036 in
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