| Screw Thread | 1-5/8 | ||
| D | 1.6250 | ||
| P | 12 | ||
| B | Min | L≤10 | 3.500 |
| B | Min | 10＜L≤16 | 3.750 |
| B | Min | L＞16 | 4.250 |
| U | Max | UNC | None |
| U | Max | UNF | None |
| U | Max | BUN | 0.250 |
| Ds | Max | 1.6250 | |
| Ds | Min | UNC | None |
| Ds | Min | UNF | None |
| Ds | Min | BUN | 1.608 |
| Ds1 | Max | UNC | None |
| Ds1 | Max | UNF | None |
| Ds1 | Max | BUN | 1.608 |
| Ds1 | Min | UNC | None |
| Ds1 | Min | UNF | None |
| Ds1 | Min | BUN | 1.534 |