2/8 fields identical6 differing sizes
ASME B18.22.1 vs ISO 7089
6 of 6 overlapping sizes show numerical differences in the listed dimensions. Check the affected rows before substituting one for the other.
Specification comparison
| Specification | ASME B18.22.1 | ISO 7089 | Verdict |
|---|---|---|---|
| Standard body | ASME | ISO | differs |
| Title | Plain Washer — Inch Series | Flat Washer — Normal Series, 200 HV | differs |
| Fastener type | Flat washer | Flat washer | identical |
| Head type | — | differs | |
| Drive | — | differs | |
| Size range | 1/4 – 3/4 | M3 – M24 | differs |
| Number of listed sizes | 6 | 13 | differs |
| Thread standard length defined | No (non-threaded-part) | No (non-threaded-part) | identical |
Dimension differences by sizecomputed from the tables in this database
| Size | Difference in this database |
|---|---|
| 1/4 | size not listed in the other standard |
| 5/16 | size not listed in the other standard |
| 3/8 | size not listed in the other standard |
| 1/2 | size not listed in the other standard |
| 5/8 | size not listed in the other standard |
| 3/4 | size not listed in the other standard |
Rows shaded amber differ between the two standards. Substitution should be checked against the affected sizes rather than assumed from the equivalence alone.