sucker rod couplings

API Class SM coupling

1）Type: SM  FS and SH coupling

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

3)Weight: 0.41-1.29 KG/Pcs

4）Material: AISI 5I40

5）Spray Material：Ni60A Alloy Coating

6）SM Thickness：0.01-0.02in

7) Basic Hardness: HRC 16-23

8）Surface Hardness: HRC 55-62

9）Hole rate: ＜2%

10）Min. Hardness of the layer: 595HV_0.2

11) Operating Temperature: -1000~400℃

12)  Life: > 180 days
13）Standard: API Spec 11B

14)Package: wooden case

15)Payment Terms: T/T

Our New Products

1) SM Coupling with great bevel edge

2) Two-way Cambered Protection Coupling

If you have any interest in our sucker rod couplings, please do not hesitate to let we know, and we’ll supply you with our high quality products and best services.

Yantai Yunsheng Petroleum Machine Accessories Co., Ltd., is a modern high-tech enterprise specialized in manufacturing petroleum machine accessories--sucker rod coupling . The company can itself research and develop to produce the Deflection-proof and Abrasion-proof Sucker Rod Coupling，Common Coupling and Sub couplings,which have passed the ISO9001 and API SPEC11B Quality Management System Certifications，Industrial Production Permit of China，and Import& Export Licence. The excellent value for money makes Yunsheng Petroleum Machine Accessories enjoy high and long-standing reputation home and abroad.