Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. For the thread cutting, we are using cold form rolled by displacing rather than by removing of material for making the coupling thread. The thread rolling cutting results in a compressive stress at the root of the thread, giving maximum strength to the traditional weak point of cut-thread couplings.

The couplings are available in full size, slim hole and over size.Also, combination couplings are available for different diameters (sub-coupling) for both Class T and Class SM couplings.
We recommend changing sucker rod couplings after three make-ups, provided the connection threads have been inspected and deemed acceptable for reuse.

* They are available in reduced slim hole (SH) diameters as well as normal full size (FS) for both API Class T(through-hardened) and Class SM (Spray Metal).

3/4" 7/8" 1" T Sucker Rod Coupling SM SH FS Coupling packing

Puyang Zhongshi Group Company Ltd was founded in 1996,which is the restructured enterprise of Central Plains oilfield branch company of SINOPEC . The company registered capital is 6083 million yuan,with annual output value 200 million yuan, 580 employees, including more than 160 technical and administrative staff. Oil machinery is our main products, the leading products include pumping unit,subsurface sucker rod pump, wellhead (Christmas Tree), pressure vessels,drilling solid control series products and cementing accessories, We had attained ISO 9001 in 1998 and API Certificates in 2002 .

We have 9 factories, more than 500 employees, and many kinds of production equipments.
We have certificates of API 5CT,6A,10D,11AX,11E, ISO 14001 and 9001.
With 10 years exporting experience,we have exported to more than 30 countries such as America,Canada,Russia,Venezuela,Columbia,Thailand,Indonesia ,UAE,Saudi Arabia,Kazakhstan etc.

All products purchased in our company are guaranteed to keep in good repair for one year. If quality problems happen in guarantee period, our company will maintain for free. Additionally, our company provides technical support and fittings for life. After-sales service isn't restricted by time and we will assign technical personnel to solve your problems immediately after receiving telephone and hear feedback idea of users and deal with them in time. If you are caught in some problems when using our products, welcome to contact us at any time.

Q: Are you trading company or manufacturer ?

A: We are factory.

Q: How long is your delivery time?

A: Generally it is 1-5days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your terms of payment ?

A: Payment<=1000USD, 100% in advance.