| Screw Thread | 7/8 | ||
| D | 0.8750 | ||
| P | 9 | ||
| B | Min | L≤10 | 2.000 |
| B | Min | 10＜L≤16 | 2.250 |
| B | Min | L＞16 | 2.750 |
| U | Max | UNC | 0.222 |
| U | Max | UNF | 0.143 |
| U | Max | BUN | None |
| Ds | Max | 0.8750 | |
| Ds | Min | UNC | 0.859 |
| Ds | Min | UNF | 0.863 |
| Ds | Min | BUN | None |
| Ds1 | Max | UNC | 0.859 |
| Ds1 | Max | UNF | 0.863 |
| Ds1 | Max | BUN | None |
| Ds1 | Min | UNC | 0.795 |
| Ds1 | Min | UNF | 0.822 |
| Ds1 | Min | BUN | None |