Below is a comprehensive list of different dimension standards associated with all types of imperial, metric plain / flat and lock washers, designed and published by Organisations such as DIN, ISO, UNI, ASME, BS and BIS.
| Description | Standard | Measurement System |
|---|---|---|
| Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Lock Washers | ANSI/ASME B18.21.1M | Metric |
| Plain Washers | ANSI/ASME B18.22.1 | Inch Series |
| Plain Washers | ANSI/ASME B18.22M | Metric |
| Heavy Helical Spring Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Extra Duty Helical Spring Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| High Collar Helical Spring Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Internal Tooth Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Heavy Internal Tooth Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| External Tooth Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Countersunk External Tooth Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Internal External Tooth Lock Washers | ANSI/ASME B18.21.1 | Inch Series |
| Tab Washers With Long Tab | DIN 93 | Metric |
| Plain Flat Washers | DIN 125A / ISO 7089 | Metric |
| Plain Flat Washers | DIN 125B / ISO 7090 | Metric |
| Plain Flat Washers Without Chamfer | DIN 126 | Metric |
| Spring Lock Washers, Form A | DIN 127A | Metric |
| Spring Lock Washers, Form B | DIN 127B | Metric |
| Curved Spring Lock Washers | DIN 128A | Metric |
| Waved Spring Lock Washers | DIN 128B | Metric |
| Tab Lock Washers With External Tab | DIN 432 | Metric |
| Square Taper Washers | DIN 434 | Metric |
| Square Bevel Washers | DIN 435 | Metric |
| Square Washers | DIN 436 | Metric |
| Large Plain Washers for Wood Construction | DIN 440 / ISO 7094 | Metric |
| Internal Tab Washers | DIN 462 | Metric |
| Tab Washers with Long Tab and Wing | DIN 463 | Metric |
| Flat Washers for Clevis Pins | DIN 1440 / ISO 8738 | Metric |
| Disc Spring Washers | DIN 2093 | Metric |
| Conical Spring Washers (Belleville Type) | DIN 6796 | Metric |
| Conical Spring Washers | ISO 10670 | Metric |
| Plain Flat Washers | ISO 7091 | Metric |
| Plain Washers for Cheese Head Screws | ISO 7092 | Metric |
| Large Plain Washers OD=3D | ISO 7093 | Metric |
| Round Machined Washers | IS 2016 | Metric |
| Round Punched Washers for Hexagonal Bolts | IS 2016 | Metric |
| Round Punched Washers for Cheese Head Screws | IS 2016 | Metric |
| Spring Lock Washers | IS 6735 | Metric |