Box-Box Adapters
Product Description
| Connection | Length C (mm) | Length Shoulder J (mm) | Width Spanner flats E (mm) | Std bore d (mm) | Outside diameter | Across Flat F (mm) | ||
| Box up A | Box down B | Top Di (mm) | Bottom D2 (mm) | |||||
| API 2 3/8*REG | API 2 3/8*REG | 70 | 20 | 51 | 24 | 78 | 78 | 65 |
| API 2 3/8*REG | API 2 7/8*REG | 152 | 51 | 51 | 25.5 | 90 | 90 | 70 |
| API 2 3/8*REG | API 3 1/2*REG | 96 | 35 | 51 | 24 | 114.5 | 114.5 | 98.5 |
| API 3 1/2*REG | API 3 1/2*REG | 178 | 63.5 | 51 | 44.5 | 114.5 | 114.5 | 98.5 |
| API 3 1/2*REG | API 4 1/2*REG | 92 | 12.5 | 70 | 38 | 114.5 | 140 | 120.5 |
| API 4 1/2*REG | API 4 1/2*REG | 203 | 76 | 51 | 58.5 | 146 | 146 | 120.5 |
