YUNSHENG is the professional manufacturer of API sucker rod couplings and haa been in this business for many years.

YUNSHENG got the API certificate on June 1, 2009. The couplings have been exported to many countries and enjoy high reputation from our customer.

API 1” Class SM Slim Hole Sucker Rod Coupling

  1) Material: AISI 5140

  2) Standard: API Spec 11B

  3) Main specification:

    OD: 2" (50.80mm)

    ID: 1-3/8"(34.93mm)

    Length: 4" (101.6mm)

    Weight: 0.58kg

4)Other Size: 5/8”; 3/4”; 7/8”; 1-1/8"

5)Smoothness: 3.1*10-3

 6)Coat Thickness(in): 0.01in ~ 0.02in

 7)Basic hardness: HRC 16-23

 8)Surface Hardness: HRC 55-62

 9)Bonding Strength(Mpa): 484

 10)Hole rate: <2%

 11)Min. Hardness of the layer: 595HV0.2

 12)Min. Tensile Strength: 655 Mpa

 13)Operating Temperature: -1000~400 Centigrade Temperature

 14)Life: > 180 days

 15) Package: wooden case, 1000pcs each case.

 16) Usage: oil exploration equipment, accessories, oil sucker rod coupling. 

API 1” Class T Slim Hole Sucker Rod Coupling

1)Material: AISI 5140

2)Standard: API Spec 11B 

3)Specification:

    OD: 2" (50.80mm)

    ID: 1-3/8"(34.93mm)

    Length: 4" (101.6mm)

    Weight: 0.58kg

4)Other Size: 5/8”; 3/4”; 7/8”; 1-1/8"

5)Features: The Class T sucker rod couplings are manufactured with a through hardness of between 16 and 23 Rc. This results in high tensile and fatigue strength for the sucker rod couplings. The outside diameter of the sucker rod couplings is smooth to minimize stress concentrations, and an accurate chamfer allows for controlled contact stress. 

For more information, please do not hesitate to contact me.

Yantai Yunsheng Petroleum Machine Accessories Co. Ltd., founded in 2005, is a professional manufacturer of API Spec 11B Sucker Rod Couplings, including Spray Metal coupling, class T coupling, Sub OD coupling, with various type of Full size, Slim Hole, Over Size, with Big Chamfer, with Wrench Flat, with Bidirectional Cambered Surface Protection, etc., and the thread size are available at 5/8", 3/4", 7/8", 1", 1-1/8".  Owning world top level equipments and technicians, the monthly production capacity is more than 20,000pcs.  All of our couplings are excellent in Quality and reasonable in Price, and the production & inspection are being done fully in accordance with API Spec11B standard.