API 7/8 FS Class SM Sucker Rod Couplings

Yantai Yunsheng Petroleum Machine Accessories, Co., Ltd , funded in 1997, presently is one of biggest enterprises producing double protection sucker rod couplings inside China. We now have more than 10 production lines then we can supply 20000 pcs SM sucker rod coupling per month.

All of our couplings including API Class T Sucker Rod Couplings, API spray metal sucker rod couplings and API Change-Over Sucker Rod Couplings are made full in line with API SPEC 11B, with the size range of 5/8”, 3/4”, 7/8”, 1”, 1-1/8”.

Paramater of coupling perfomanceï¼Âš 

7/8 " FS API Class SM coupling

1-Type: SM  FS  coupling

2-Coupling diameter: 7/8 "

-O.D: 1-13/16" [40.04mm]

     -I.D: 1-3/16" [30.16mm]

     -Length: 4"[101.6mm]

3-Weight: 0.74 KG/Pcs

4-Material: AISI 5I40

5-Spray Material  Ni60A Alloy Coating

6-Basic Hardness: HRC 16-23

7-Surface Hardness: HRC 55-62

8-Hole rate: less than 2%

9-Min. Hardness of the layer: 595HV_0.2

10-Coat Thickness(in): 0.01in ~ 0.02in

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) Full Size SM Coupling with great bevel edge

2) Two-way Cambered Protection SM 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.