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Sucker Rod Coupling
1)Type: T sucker rod coupling, class SM sucker rod coupling, sub sucker rod coupling, full size sucker rod coupling, slime hole sucker rod coupling
2)New Products: Both-way Globoidal Protection sucker rod coupling, Class SM Full size sucker rod coupling with big chamfer
3)Material: seamless alloy steel AISI 5140
4) SM coupling coating material : Ni60A Alloy.
5)Basic Hardness: HRC 16-23
6)Surface Hardness: HRC 55-62
7)Hole rate: 2%
8)Min. Hardness of the layer: 595HV0.2
9)Standard: API Spec 11B
10)Coupling diameter: 5/8",3/4",7/8",1",1-1/8"
11)Package: wooden case
12)Payment: T/T
Coupling of Sucker Rod API
