Features:
1.API 11B 15.9(5/8"); 19.1(3/4"); 22.2(7/8"); 25.4 (1");
2.Connecting thread type: sucker rod thread
3.With or without sucker rod wrench square
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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.
All of its technical specifications meet the oil and gas industry standard SY/T5029-2003 and the American Petroleum Institution API SPEC 11B standard. It is fully tested after finished production to make it function well in use.
