Sub- Coupling of API Spec 11B, Size: 5/8"-3/4", 3/4"-7/8", 7/8"-1", 1"-1 1/8" Materials:5140

 Sub coupling:

Features: spray welding in general based on the hoop increases the external chamfer at   both ends, greatly reducing the contact with the pipeline, but also by friction, abrasion resistance, extended collar and tubing life.

 Materials: Materials international 40Cr, AISI5140

 Grade: Class SM and ClassT 

 Size: full-scale and two slimhole

 Specification :1-1 / 8 "* 1", 1 "* 7 / 8", 7 / 8 "* 3 / 4", 3 / 4 "* 5 / 8"

 Usage: oil exploration equipment, accessories, oil sucker rod coupling

life:> = 6 months

Sub Coupling specifications and main dimensions:

Model

Nominal thread diameter

O.D.

LENGTH

GRADE

YJG5/8-3/4

15/16-11/16

41.3

101.6mm/4in

SM,T

YJG3/4-7/8

11/16-13/16

46.0

YJG7/8-1

1 3/16-13/8

55.6