API 11B standard sucker rod coupling
7/8" spray metal full size
Manufacturer API Approval
Excellent quality&competitive price

Yantai Yunsheng Petroleun Machine Accessories Co., Ltd.,is a Private limited liability company specializing in the manufacture and export of sucker rod coupling, including SM full size coupling, SM slim hole coupling, T full size coupling, T slim hole coupling and  Sub Coupling, which are made according to the API Spec 11B.

The class SM 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 cant only protect itself but also the rod, preventing and slowing down the wear. The coupling has many types and sizes, and it is made of good quality steel alloy 40Cr. It has three functions : wear proof, corrosion-resisting and reducing the friction.

1) Materials: Seamless Alloy Steel 40Cr (AISI 5140)
2) Standard: API Spec 11B
3) Class: T& SM , Sub Coupling
4) Main specification: 5/8", 3/4", 7/8", 1", 1-1/8"

5) Package: wooden case