Yunsheng 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