| Part No. | Gun Type | Stud Size | Style |
|---|---|---|---|
| 028-833 | Pro-Weld Int. | 1/8 – 3/8 | F |
| B-1N-Nelson | Nelson NS-20 | 1/8 – 1/2 | A |
| B1N-Pro-Weld | Pro-Weld Int. | 1/8 – 1/2 | A |
| B-2N-Nelson | Nelson NS-20 | 5/8 – 3/4 | B |
| B-2N-Pro-Weld | Pro-Weld Int. | 5/8 – 3/4 | B |
| B-3N-Nelson | Nelson NS-20 | 7/8 – 1″ | C |
| B-3N-Pro-Weld | Pro-Weld Int. | 7/8 – 1″ | C |
| B-4N | Bantam A-58 | 1/8 – 1/2 | E |
| B-5N | Bantam A-58 | 5/8 – 3/4 | E |
| B-6N | Nelson NS-30 | 1/8 – 1/2 | D |
| B-7N | Nelson NS-30 | 5/8 – 3/4 | D |