Our coupling has the following advantages: Anti-abrasion resistance, corrosion resistance, and reducing friction.

 Paramater of coupling perfomance

           API Sub coupling

1)Type: T&SM 

2)Coupling diameter: 3/4"*7/8"

   -O.D: 1-5/8"[41.3mm]

   -Length: 4.5"[114.3mm]

3)Weight: 0.61 KG/Pcs

4)Material: AISI 5140

5)SM Coupling Spray Material Ni60A Alloy Coating

6)Basic Hardness: HRC 16-23

7)SM Coupling Surface Hardness: HRC 55-62

8)SM Coupling Coat Thickness(in): 0.01in ~ 0.02in

9)SM Coupling Hole rate: 2%

10)SM Coupling Min. Hardness of the layer: 595HV0.2

11) Operating Temperature: -1000~400

12)  Life: Class SM Sub Coupling > 180 days;

              Class T Sub Coupling > 90 days

13)Standard: API Spec 11B

14)Package: wooden case

15)Payment Terms: T/T

Our New Products

1) Full Size SM Coupling with great bevel edge

2) Two-way Cambered Protection SM Coupling

If you have any interest in our sucker rod couplings, please do not hesitate to let we know, and well supply you with our high quality products and best services.

3/4"*7/8"SH API Sub couplings