Yunsheng sucker rod couplings are up to API Spec 11B standard, including class SM sucker rod coupling, class T sucker rod coupling, Sub sucker rod coupling, Full Size sucker rod coupling, Slim Hole sucker rod coupling, are availbale in size of 5/8, 3/4, 7/8, 1 and 1-1/8.With over 20000pcs monthly capacity.Manufactured with high quality Carbon steel AISI 5I40  . Our surface alloy thermal spray coating process of our spray metal sucker rod coupling has reached the international advanced level.

API Spray Metal Sucker Rod Coupling
1Standard: API Spec 11B

2Basic Material: AISI 5140 (40Cr),
3Coat Material:Ni60A Alloy Coating

4Coat Thickness: 0.01-0.02 in
5Basic Hardness: HRC 16-23 (HRA 58-62)

6Surface hardness: HRC 55-62
7Metal coating hardness: 595 HV0.2

8Type:Full size/Slim Hole
9Coupling diameter: 5/8 ", 3/4", 7/8", 1", 1-1/8"

If any of our sucker rod couplings attracts you, pls feel free to contact us for further information.

Due to we're the special manufacturer, we can offer you the highest quality and the best price to build a long-term business relationship with you.

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.