Yantai Yunsheng Petroleum Machine Accessories Co., Ltd, founded in 1997, is a professional manufacturer of API 11B sucker rod couplings, including Spray Metal coupling, class T coupling, Altra High Strength,Sub OD coupling, with various spec. of Full size, Slim Hole, grand chamfer, Two-way camber, etc. to produce API 11B sucker rod.

     The SPRAY METAL sucker rod coupling is processed with some special technology, coated a layer of abrasion-proof, wear-proof and lessening friction coat. It can’t 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.

5/8' Class SM sucker rod coupling

7/8' Class SM sucker rod coupling

1'Class SM sucker rod coupling

1-1/8' CLass SM sucker rod couplings

SUB OD sucker rod coupling

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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.