| 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) | |||||
| API2 3/8*REG | API2 3/8*REG | 70 | 20 | 50.8 | 24 | 78 | 78 | 65 |
| API2 3/8*REG | API2 7/8*REG | 152.4 | 50.8 | 50.8 | 25.4 | 88.9 | 88.9 | 69.85 |
| API2 3/8*REG | API3 1/2*REG | 96 | 35 | 50.8 | 24 | 114.3 | 114.3 | 98.4 |
| API3 1/2*REG | API3 1/2*REG | 177.8 | 63.5 | 50.8 | 44.45 | 114.3 | 114.3 | 98.4 |
| API3 1/2*REG | API4 1/2*REG | 92 | 12.7 | 69.85 | 38.1 | 114.3 | 139.7 | 120.65 |
| API4 1/2*REG | API4 1/2*REG | 203.2 | 76.2 | 50.8 | 58.7 | 146 | 146 | 120.65 |
EN
