- Bulkhead Union
| Body Material | Size 1 | Size 2 |
| Alloy 400 | 1/16″ | 1/16″ |
| Brass | 1/8″ | 1/8″ |
| Stainless Steel 316 | 3/16″ | 3/16″ |
| 1/4″ | 1/4″ | |
| 5/16″ | 5/16″ | |
| 3/8″ | 3/8″ | |
| 1/2″ | 1/2″ | |
| 5/8″ | 5/8″ | |
| 3/4″ | 3/4″ | |
| 1″ | 1″ | |
| 6mm | 6mm | |
| 8mm | 8mm | |
| 10mm | 10mm | |
| 12mm | 12mm | |
| 14mm | 14mm | |
| 15mm | 15mm | |
| 16mm | 16mm | |
| 18mm | 18mm | |
| 20mm | 20mm | |
| 25mm | 25mm |