SM coupling for sucker rod in details:

1. Steel bars for raw material, good alloy AISI ***0(*0Cr).

2. CNC precision sizes.

3. Thermal Spray Welding technology on Coupling surface.

4. Rolled Thread, made by API standard Extrusion Tap,*0 thds/inch.
5. Manganides Phosphating on coupling whole body.

6. Several times fine grinding make couplings Excellentt quality and a beautiful outlook.
7. API Standard Marks on Coupling Body, or as per customers’ requirements.
8. International Seaworthy Package or to order of Customers.

9. It is processed with some special technology, sprayed with a layer of
rust-proof, wear-proof and lessening friction alloy coating, based on
the T Coupling.

*0.Because of the layer based on nikel-based alloy, its life-scape is also longer, even twice of class T coupling.

*1. it is made of good quality steel alloy AISI ***0,covers Full Size, Slim Hole and Over Size.