1.Low price but good quality 2.Manufactured in accordance with API Spec 11B standard 3.Connect different sizes of Sucker Rod

Paramater of coupling perfomance

5/8"*3/4"FS API Sub coupling

1)Type: T&SM 

2)Coupling diameter: 5/8"*3/4"

   -O.D: 1-5/8"[41.28mm]

   -Length: 4.5"[114.3mm]

3) Weight: 0.76KG/Pcs

4)Material: AISI 5I40

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 days13)Standard: API Spec 11B

If you are interested in our production, please let us have your specific enquiry, and our quotation will be forwarded without delay. Business between us will be concluded on the basis of shipping quality and reasonable price, and necessary certificates in regard to the quality and quantity of shipment will, of course, be provided.

We look forward to your early reply with much interest.

OILFIELD EQUIPMENT, 5/8"*3/4"FS API Sub coupling