API 5/8” Class T Sucker Rod Coupling

API 5/8” Class T Full Size Sucker Rod Coupling 1)Material: AISI 5140 2)Standard: API Spec 11B 3)Specification: O.D.: 1-1/2”(38.10mm) I.D.: 15/16”(23.81mm) Length: 4”(101.6mm) Weight: 0.56kg4)Other Size: 3/4”; 7/8”;1”; 1-1/8”5)Features: The Class T sucker rod couplings are manufactured with a through hardness of between 16 and 23 Rc. This results in high tensile and fatigue strength for the sucker rod couplings. The outside diameter of the sucker rod couplings is smooth to minimize stress concentrations, and an accurate chamfer allows for controlled contact stress. Smoothness: 3.1*10-3 Coat Thickness(in): 0.01in ~ 0.02in Basic hardness: HRC 16-23 Surface Hardness: HRC 55-62 Hole rate: <2% Bonding Strength(Mpa): 484 Min. Hardness of the layer: 595HV0.2 Min. Tensile Strength: 655 Mpa Operating Temperature: -1000~400 Centigrade Temperature Life: > 180 days Package: wooden case, 1000pcs each case. Usage: oil exploration equipment, accessories, oil sucker rod coupling