API Water Well Adaptors
North Star API Water Well Adaptors connect drill rods and compatible tooling in a water well drilling assembly. These adaptor subs are available with pin-box, pin-pin and box-box connection arrangements, with custom configurations reviewed against customer specifications.
API Water Well Adaptors in 6 Diameter Groups
The specification tables list 76, 89, 102, 114, 127 and 140 mm diameters. Each row identifies the listed length, box thread, pin thread and wrench flat dimensions. Additional diameters and lengths are available on request. Select a complete configuration rather than combining dimensions from different rows.
Drill Pipe Adapters and Connection Options
Drill pipe adapters provide a connection between components of a drill string. A pin is an external threaded end; a box is an internal threaded end. Pin-box, pin-pin and box-box arrangements describe the ends required for the mating components. Confirm both ends of the adaptor before ordering.
The tables include API, IF, BECO and NC35 designations in the specific combinations shown. Availability varies by diameter and configuration. A nominal thread size alone does not confirm interchangeability: the exact thread designation, connection drawing and mating component must also be checked.
Choosing Water Well Adaptors
Start with the connections on your existing drill rods and tooling. Record which end requires a pin and which requires a box, then provide the exact thread designation for each end. Compare the required adaptor diameter and finished length with the listed configurations. Where a crossover sub is needed, specify the two different mating connections clearly.
The tables retain the listed standard dimensions and include separate on-request fields for lengths and wrench flats. Confirm the required finished dimensions in your quotation. Do not assume that an on-request option changes a listed standard dimension without review.
Adaptor Subs for Your Drill Pipe Assembly
Use these API Water Well Adaptors alongside the appropriate API water well drill rods. For related equipment, explore our water well drilling product range. Connection suitability depends on the specific drill string configuration.
Custom API Water Well Adaptors
Send your rig model, adaptor diameter, finished length, required pin and box threads, wrench flat requirements and quantity. Include drawings or details of the mating components when replacing an existing adaptor. North Star can review customer-specified configurations against these details.
API Water Well Adaptors Specifications
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 76 | 3 | 100 | 3.94 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 130 | 5.12 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 160 | 6.30 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 180 | 7.09 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 200 | 7.87 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 220 | 8.66 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 250 | 9.84 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 260 | 10.24 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 280 | 11.02 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 300 | 11.81 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 320 | 12.60 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 340 | 13.39 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 360 | 14.17 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 380 | 14.96 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 400 | 15.75 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 420 | 16.54 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 440 | 17.32 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 460 | 18.11 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 500 | 19.68 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 520 | 20.47 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 76 | 3 | 540 | 21.26 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
Additional diameters and lengths available on request
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 89 | 3.50 | 100 | 3.94 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 130 | 5.12 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 170 | 6.69 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 200 | 7.87 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 220 | 8.66 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 250 | 9.84 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 270 | 10.63 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 300 | 11.81 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 320 | 12.60 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 350 | 13.78 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 380 | 14.96 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 400 | 15.75 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 430 | 16.93 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 450 | 17.72 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 480 | 18.90 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 500 | 19.68 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 530 | 20.87 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 550 | 21.65 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 580 | 22.83 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 600 | 23.62 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 650 | 25.59 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 680 | 26.77 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 700 | 27.56 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 730 | 28.74 | 2 3/8″ IF | 2 3/8″ IF | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 750 | 29.53 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 780 | 30.71 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 810 | 31.89 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 830 | 32.68 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 860 | 33.86 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 880 | 34.65 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 910 | 35.83 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
| 89 | 3.50 | 930 | 36.61 | 2 3/8″ API | 2 3/8″ API | A/F65 | 2.5 | On Request | On Request |
Additional diameters and lengths available on request
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 102 | 4 | 120 | 4.72 | 2 3/8″ IF | 2 3/8″ IF | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 140 | 5.51 | 2 3/8″ IF | 2 3/8″ IF | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 180 | 7.09 | 2 7/8″ API | 2 7/8″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 210 | 8.27 | 2 3/8″ API | 2 3/8″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 300 | 11.81 | 2 3/8″ IF | 2 3/8″ IF | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 360 | 14.17 | 2 7/8″ API | 2 7/8″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 410 | 16.14 | 3 1/2″ API | 3 1/2″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 480 | 18.90 | 3 1/2″ API | 3 1/2″ API | A/F65 | 3 | On Request | On Request |
| 102 | 4 | 520 | 20.47 | 2 7/8″ API | 2 7/8″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 600 | 23.62 | 2 7/8″ API | 2 7/8″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 660 | 25.98 | 3 1/2″ API | 3 1/2″ API | A/F75 | 3 | On Request | On Request |
| 102 | 4 | 700 | 27.56 | 2 7/8″ IF | 2 7/8″ IF | A/F75 | 3 | On Request | On Request |
Additional diameters and lengths available on request
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 114 | 4.50 | 120 | 4.72 | 3 1/2″ API | 3 1/2″ API | A/F75 | 3 | On Request | On Request |
| 114 | 4.50 | 140 | 5.51 | 3 1/2″ API | 3″ BECO | A/F75 | 3 | On Request | On Request |
| 114 | 4.50 | 180 | 7.09 | 3 1/2″ API | 3 1/2″ API | A/F75 | 3 | On Request | On Request |
| 114 | 4.50 | 210 | 8.27 | 3″ BECO | 3″ BECO | A/F90 | 3.5 | On Request | On Request |
| 114 | 4.50 | 300 | 11.81 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 360 | 14.17 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 410 | 16.14 | 2 3/8″ IF | 2 7/8″ IF | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 480 | 18.90 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 520 | 20.47 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 600 | 23.62 | 2 3/8″ API | 2 3/8″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 660 | 25.98 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 700 | 27.56 | 3 1/2″ IF | 3 1/2″ IF | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 740 | 29.13 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 790 | 31.10 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 820 | 32.38 | 3 1/2″ IF | 3 1/2″ IF | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 850 | 33.46 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 880 | 34.65 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 910 | 35.83 | 3 1/2″ IF | 3 1/2″ IF | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 940 | 37.01 | 2 7/8″ API | 2 7/8″ API | A/F95 | 3.75 | On Request | On Request |
| 114 | 4.50 | 970 | 38.19 | NC35 | NC35 | A/F95 | 3.75 | On Request | On Request |
Additional diameters and lengths available on request
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 127 | 5 | 300 | 11,81 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 127 | 5 | 360 | 14,17 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 127 | 5 | 410 | 16.14 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 127 | 5 | 480 | 18.90 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 127 | 5 | 520 | 20.47 | 3 1/2″ API | 3 1/2″ API | A/F95 | 3.75 | On Request | On Request |
| 127 | 5 | 600 | 23.62 | 3 1/2″ API | 3 1/2″ API | A/F95 | 4.75 | On Request | On Request |
| 127 | 5 | 700 | 27.56 | 3 1/2″ API | 3 1/2″ API | A/F95 | 5.75 | On Request | On Request |
| 127 | 5 | 820 | 32.28 | 3 1/2″ API | 3 1/2″ API | A/F95 | 6.75 | On Request | On Request |
| 127 | 5 | 910 | 35.83 | 3 1/2″ API | 3 1/2″ API | A/F95 | 7.75 | On Request | On Request |
Additional diameters and lengths available on request
| Diameter (mm) | Diameter (in) | Length (mm) | Length (in)s | Box Thread | Pin Thread | Wrench Flat Width (mm) | Wrench Flat Width (in) | Lengths | Wrench Flats |
|---|---|---|---|---|---|---|---|---|---|
| 140 | 5.50 | 300 | 11.81 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 360 | 14.17 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 410 | 16.14 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 460 | 18.11 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 520 | 20.47 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 600 | 23.62 | 3 1/2″ IF | 3 1/2″ IF | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 700 | 27.56 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 730 | 28.74 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 750 | 29.53 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 780 | 30.71 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 820 | 32.28 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 850 | 33.46 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 870 | 34.25 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 900 | 35.43 | 4 1/2″ API | 4 1/2″ API | A/F120 | 4.75 | On Request | On Request |
| 140 | 5.50 | 920 | 36.22 | 3 1/2″ API | 3 1/2″ API | A/F120 | 4.75 | On Request | On Request |
Additional diameters and lengths available on request
