Malleable cast iron washers are large, oversized washers available both plain and galvanized.
| Bolt Size | A | T | Weight (lbs.) Per 100 Pieces | Part Numbers | |||
|---|---|---|---|---|---|---|---|
| Outside Diameter | Thickness Gauge | Domestic | Import | ||||
| Plain | Galvanized | Plain | Galvanized | ||||
| 1⁄2 | 21⁄2 | 1⁄4 | 22 | 19728 | 19729 | 11983 | 11984 |
| 5⁄8 | 23⁄4 | 5⁄16 | 32 | 19730 | 19731 | 11985 | 11986 |
| 3⁄4 | 3 | 7⁄16 | 42 | 19732 | 19733 | 11987 | 11988 |
| 7⁄8 | 31⁄2 | 7⁄16 | 55 | 19734 | 19735 | 11989 | 11990 |
| 1 | 33⁄4 | 1⁄2 | 63 | 19736 | 19737 | 11991 | 11992 |
| 11⁄8 | 41⁄2 | 1⁄2 | 96 | - | - | 18404 | 18406 |
| 11⁄4 | 5 | 9⁄16 | 121 | - | - | 11995 | 11996 |
| 11⁄2 | 6 | 3⁄4 | 187 | - | - | 15751 | 15752 |
| Reference ASTM A47 for general casting information. | |||||||