good quality and price.
Specification:1" 1-1/8" 1-1/4" 1-1/2"
Class SM coupling for sucker rods are manufactured as per API 11B.Class SM with Ni60 coating used for corrosive well. Using AISI 5140 to manufacture.
Specification:5/8", 3/4", 7/8"1", 1 1/8"
Class T coupling for sucker rods are manufactured as per API 11B. Class T sucker rod couplings used for regular well with mature technology and high quality
Using AISI 5140 to manufacture.
Specification:5/8", 3/4", 7/8"1", 1 1/8"
