Back Ferrule
FAV Ferrule compression fitting consists of body, Front ferrule, Back Ferrule nut which are the crux of instrumentation tube fittings.
| PART No. | 0D1 Imperial |
| FCF/BF/1I | 1/16 |
| FCF/BF/2I | 1/8 |
| FCF/BF/3I | 3/16 |
| FCF/BF/4I | 1/4 |
| FCF/BF/5I | 5/16 |
| FCF/BF/6I | 3/8 |
| FCF/BF/8I | 1/2 |
| FCF/BF/10I | 5/8 |
| FCF/BF/12I | 3/4 |
| FCF/BF/14I | 7/8 |
| FCF/BF/16I | 1 |
| FCF/BF/20I | 1-1/4 |
| FCF/BF/24I | 1-1/2 |
| FCF/BF/32I | 2 |