Tianjin Soright supply T class sucker rod couplings, we also have spraying metal sucker rod couplings.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. Specification: 5/8”, 3/4”, 7/8”, 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. Specification: 5/8”, 3/4”, 7/8”, 1”, 1-1/8Class: T, SM (Spraying Metal)Standard: API 11B