Main Bearing Grade Numbers
| Thickness "T" | ||
| No.1 Main Bearing | Grade Number 0 | 0.0715 - 0.0717 Inch (in) |
| Grade Number 1 | 0.0717 - 0.0719 Inch (in) | |
| Grade Number 2 | 0.0719 - 0.0720 Inch (in) | |
| Grade Number 3 | 0.0720 - 0.0722 Inch (in) | |
| Grade Number 4 | 0.0722 - 0.0723 Inch (in) | |
| No. 2 and 3 Main Bearing | Grade Number 0 | 0.0715-0.0717 Inch (in) |
| Grade Number 1 | 0.0717-0.0719 Inch (in) | |
| Grade Number 2 | 0.0719-0.0720 Inch (in) | |
| Grade Number 3 | 0.0720 - 0.0722 Inch (in) | |
| Grade Number 4 | 0.0722 - 0.0723 Inch (in) |