| Connection |
Tube O.D. x I.D. in. |
Thread Size (Left Hand) |
Complete Ordering Number |
| MF4 | 1/4 × 0.109 | 1/4-28 UNF | HTT-4 |
| MF6 | 3/8 × 0.203 | 3/8-24 UNF | HTT-6 |
| MF9 | 9/16 × 0.312 | 9/16-18 UNF | HTT-9 |
| HF4 | 1/4 × 0.083 | 1/4-28 UNF | HTT-4 |
| HF6 | 3/8 × 0.125 | 3/8-24 UNF | HTT-6 |
| HF9 | 9/16 × 0.188 | 9/16-18 UNF | HTT-9 |
| Connection |
Tube O.D. x I.D. in. |
Ordering Number of Threading Die |
Ordering Number of Bushing |
| MF4 | 1/4 × 0.109 | HTT-4-D | HTT-4-GS |
| MF6 | 3/8 × 0.203 | HTT-6-D | HTT-6-GS |
| MF9 | 9/16 × 0.312 | HTT-9-D | HTT-9-GS |
| HF4 | 1/4 × 0.083 | HTT-4-D | HTT-4-GS |
| HF6 | 3/8 × 0.125 | HTT-6-D | HTT-6-GS |
| HF9 | 9/16 × 0.188 | HTT-9-D | HTT-9-GS |
