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Sucker Rod Coupling Class T: coupling and the outside circle, but according to user we can also provide no wrench square.Hardness of coupling T is HRA56-62 after heat treatment, with good corrosion resistance and wear resistance ...

Grade D Sucker Rod: coupling to be a rod string, and up through polished rod connection on the pumping unit or PCP motor, down connection on the pump piston or PCP, its role is to ground the reciprocating movement of ...

Grade D Sucker Rod: coupling to be a rod string, and up through polished rod connection on the pumping unit or PCP motor, down connection on the pump piston or PCP, its role is to ground the reciprocating movement of ...

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Sucker Rod Coupling Class T