Product Description
Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. 
Class T coupling use AISI 5140 to manufacture.
Class SM coupling is applied on the base metal.
The coupling is coated using phosphate chemical treatment or blackoxide on customer's request.
The couplings are available in full size, slim hole and over size.
Combination couplings are available for different diameters for both Class T and Class SM couplings.
 
Specification of sucker rod coupling