7/8" full size spray metal coupling

1) Material: Seamless Alloy Steel 40Cr (AISI 5140)
2) Standard: API Spec 11B
3) Class: SM
4) Main specification:
7/8"Full Size Spray metal Sucker Rod Coupling
OD:1 13/16" (46.04mm)
ID: 1 3/16"(30.16mm)
Length: 4" (101.6mm)
Weight: 0.6kg
Smoothness: 3.1×10-3
Coat Thickness(in): 0.01in ~ 0.02in
Basic hardness: HRC 16-23
Surface Hardness: HRC 58-62
Intergrate intension(Mpa): 484
Hole rate: <2%
Min. Hardness of the layer: 595HV0.2
Min. Tensile Strength: 655 Mpa
Operating Temperature: -1000~400?
Life: > 180 days
5) Package: wooden case,1000pcs each case.
6) Usage: oil exploration equipment, accessories, oil sucker rod coupling
Payment Terms : 50% deposite in advance, delivery against payment by T/T.
Minimum Order : 1000
Others : Payment terms and price can be charged depends on you demand quantity and your annual need. The quantity larger, the price better

7/8" full size spray metal coupling