Yantai Yunsheng Petroleum Machine Accessories Co., Ltd. produce API approved sucker rod couplings, including Spray Metal sucker rod coupling, calss T sucker rod coupling, Sub sucker rod coupling, Full size sucker rod coupling and slim hole sucker rod coupling, with the size range of 5/8", 3/4", 7/8", 1" 1-1/8". The basic materials is AISI 5140. And the coat layer of the SM coupling is Nickel base alloy poeder which can greatly reduce the friction between the couplings and tubing.

All of our products are excellent in quality and low in price, which satisfied many of our customers home and overseas. We have the API Spec 11B certificate. So we are one of the reliable suppliers you can trust in China.

API  7/8" Spray Metal Sucker Rod Coupling

 1) Material: Seamless Alloy Steel 40Cr (AISI 5140)
 2) Standard: API Spec 11B
 3) Main specification: 
     Full Size:     OD:1-13/16" (46.04mm)
                         ID: 1-3/16"(30.16mm)
                         Length: 4" (101.6mm)
                         Weight: 0.74kg
     Slim Hole:   OD:1-5/8" (46.04mm)
                         ID: 1-3/16"(30.16mm)
                         Length: 4" (101.6mm)
                         Weight: 0.52kg

 4)Smoothness: 3.1×10-3
 5)Coat Thickness(in): 0.01in ~ 0.02in
 6)Basic hardness: HRC 16-23
 7)Surface Hardness: HRC 55-62
 8)Intergrate intension(Mpa): 484
 9)Hole rate: 2%
 10)Min. Hardness of the layer: 595HV0.2
 11)Min. Tensile Strength: 655 Mpa
 12)Operating Temperature: -1000~400
 13)Life: > 180 days

For more information, please contact me at any time.

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.