API 5/8” Class SM Full Size Sucker Rod Coupling 1) Material: AISI 5140 2) Standard: API Spec 11B 3) Main specification: OD:1-1/2" (38.10mm) ID: 15/16"(23.81mm) Length: 4" (101.6mm) Weight: 0.56kg 4)Other Size: 3/4”; 7/8”;1”; 1-1/8”5)Smoothness: 3.1*10-3 6)Coat Thickness(in): 0.01in ~ 0.02in 7)Basic hardness: HRC 16-23 8)Surface Hardness: HRC 55-62 10)Hole rate: <2% 9)Bonding Strength(Mpa): 484 11)Min. Hardness of the layer: 595HV0.2 12)Min. Tensile Strength: 655 Mpa 13)Operating Temperature: -1000~400 Centigrade Temperature 14)Life: > 180 days 15) Package: wooden case, 1000pcs each case. 16) Usage: oil exploration equipment, accessories, oil sucker rod coupling
