Cap (BCA)
| Designations | Tube O.D | Width across flat | t | ℓ | Approx. | |
| D | H1 | H | L | |||
| BCA-06 | 6 | 14 | 14 | 7.0 | 18 | 28.5 |
| BCA-08 | 8 | 17 | 17 | 7.0 | 19 | 29.5 |
| BCA-10 | 10 | 17 | 19 | 7.0 | 20 | 31.5 |
| BCA-12 | 12 | 19 | 22 | 7.0 | 20 | 31.5 |
| BCA-15 | 15 | 24 | 27 | 7.5 | 22 | 34.5 |
| BCA-16 | 16 | 27 | 30 | 7.5 | 24 | 36.5 |
| BCA-18 | 18 | 27 | 32 | 8.0 | 24 | 36.5 |
| BCA-20 | 20 | 30 | 36 | 8.0 | 24 | 36.5 |
| BCA-22 | 22 | 32 | 36 | 9.0 | 25 | 37.5 |
| BCA-25 | 25 | 36 | 41 | 10.0 | 25 | 38.5 |
| BCA-28 | 28 | 41 | 46 | 10.0 | 28 | 42.0 |
| BCA-30 | 30 | 41 | 46 | 10.0 | 28 | 42.5 |
| BCA-32 | 32 | 46 | 50 | 11.0 | 30 | 44.5 |