AASHTO to ASTM Conversion Table
| AASHTO Grade | ASTM Equivalent | Description |
|---|---|---|
| M-111 | A123 | Hot-dip galvanizing of iron and steel products |
| M-164 | A325 | Structural bolt |
| M-183 | A36 | Raw material, low carbon steel |
| M-222 | A588 | Raw material, weathering steel |
| M-223 | A572 | Raw material, high strength low alloy |
| M-232 | A153 | Hot-dip galvanizing of fasteners |
| M-253 | A490 | Structural bolt |
| M-291 | A563 | Nut specification possessing many grades |
| M-292 | A194 | High strength, heavy hex nut |
| M-293 | F436 | Hardened washer |
| M-314 | F1554 | Anchor bolt specification with 3 grades |