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

 API 7/8” Class SM Full Size Sucker Rod Coupling

 1) Material: AISI 5140

 2) Standard: API Spec 11B

 3) Main specification:

      OD:1-13/16" (46.04mm)

      ID: 1-3/16"(30.16mm)

      Length: 4" (101.6mm)

      Weight: 0.74kg

 4)Other Size: 5/8”; 3/4”;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

 9)Bonding Strength(Mpa): 484

 10)Hole rate: <2%

 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

For more information, please feel free to contact me at any time.

API 7/8" sucker rod coupling, class SM