Malleable cast iron round washers are used in dock and wood construction. These oversized washers have a large bearing surface designed to prevent bolt heads and nuts from pulling into the wood.
Stock
Diameters: 1/2″ – 1″
Origin: Domestic (no keyhole) and Import (keyhole)
Finish: Plain and hot-dip galvanized
Dimensions
| 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. | |||||||
Slight variations in thickness and outside diameter dimensions may exist from one lot of washers to another. If these dimensions are critical, ask your Portland Bolt sales representative to check the dimensions of current inventory prior to ordering.