High Quality API 11B Threaded Sucker Rod Coupling for Oilfield
3/4" 7/8" 1" T Sucker Rod Coupling SM SH FS Coupling
1.The sucker rod coupling have the same box thread size in each end are used for connecting sucker rod and/or pony rod, and/or sinker bars with sucker rod threads.
2.The polished rod coupling have the same box thread size in each end are used for connecting polished rod and/or sinker bars with polished rod threads to the sucker rod string.
3.The sub-coupling have different sizes of box threads in each end are used for connecting two sizes of sucker rods or a polished rod to a sucker rod string.
| Type | Grade | O.D (mm) | Minimum Lengh (mm) | Hardness | Weight (kg) | Standard |
| 3/4" | 19-T | 41.05~41.43 | 101.6~103.17 | 56-62HRA | 0.65 | API 11B |
| 7/8" | 22-T | 45.75~46.13 | 45.75~46.13 | 56-62HRA | 0.8 | API 11B |
| 1" | 25-T | 55.3.5~55.73 | 55.35~55.73 | 12-23HRA | 1.15 | API 11B |
3/4" 7/8" 1" T Sucker Rod Coupling SM SH FS Coupling packing
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