Tianjin Soright Tech supply Slim hole rod coupling

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”, 1-1/8

Class: T, SM (Spraying Metal)

Standard: API 11B