Two types of coupling are available which meet API Specifications: Regular API Class T Coupling and Spray Metal Coupling for anti corrosion. The Deflection-proof and Abrasion-proof Sucker Rod Coupling is my special product, which is processed with some special technology, coated a layer of abrasion-proof, wear-proof and lessening friction coat. It can not only protect itself but also the rod, preventing and slowing down the wear.

 Sucker rod coupling,Class SM

1)Type: FS SM coupling

2)New: Both-way Protection Globoidal Coupling Full size SM coupling with big chamfer

3)Material: High quality Carbon steel AISI 5140

4)Coating:Spray Material Ni60A Alloy Coating

5)Basic Hardness: HRC 16-23

6)Surface Hardness: HRC 55-62

7)Hole rate: 2%

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

9)Standard: API Spec 11B

10)Coupling diameter: 5/8",3/4",7/8",1",1-1/8"

11)Weight: 0.60 KG/pc

If you are interested in any of our sucker rod coupling, please feel free to contact us for more information.We assure you of our best service all the 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.