Series A (MSS SP-44)
| Class | Welding neck | Blind |
| 150 | NPS 26- 60 | NPS 26- 60 |
| 300 | NPS 26- 60 | NPS 26- 60 |
| 400 | NPS 26- 60 | NPS 26- 60 |
| 600 | NPS 26- 60 | NPS 26- 60 |
| 900 | NPS 26- 48 | NPS 26- 48 |
Series B (API 605)
| Class | Welding neck | Blind |
| 75 | NPS 26- 60 | NPS 26- 60 |
| 150 | NPS 26- 60 | NPS 26- 60 |
| 300 | NPS 26- 60 | NPS 26- 60 |
| 400 | NPS 26- 36 | NPS 26- 36 |
| 600 | NPS 26- 36 | NPS 26- 36 |
| 900 | NPD 26- 36 | NPS 26- 36 |
