1.API SPEC 11B 2.Basic Material: AISI 5140 Coat Layer: Ni60A 3.Used to connect the sucker rods for the oil extraction.

Yantai Yunsheng Petroleum Machine Accessories Co., Ltd. is the professional manufacturer of API sucker rod couplings and have obtained the API certificate on June 1, 2009.

During the one year time since got the API, Yunsheng has exported the sucker couplings to America, Peru, Argentina, Kuwait, India, Indonesia and so on.

Moreover, we also have established long-term relationship with our customers home and abroad.

API SUCKER ROD COUPLINGS, CLASS T

1)Material: Seamless Alloy Steel 40Cr (AISI 5140) 2)Standard: API Spec 11B  3)Type: Full Size and Slim Hole

4)Other Size: 3/4”; 7/8”;1”; 1-1/8"5)Features: The Class T coupling is manufactured with a through hardness of between 16 and 23 Rc. This result in high tensile and fatigue strengh for the coupling. The outside diameter is smooth to minimize stress concerntrations, and an accurate chamfer allows for controlled contact stress. The threads are rolled full form which results in compressive stresses at the thread root and improved fatigue resistance.

For more information, please feel free to contant me at anytime.

API 11B sucker rod couplings,class T