Product Description:
API standard couplingshall be machined from the coupling blank,and made from the coupling material ,coupling stocks or hot forging.
Standard size:
Standard: API 5CT, API 5B
Steel Grade: J55, K55, L80, N80, C90, C95, T95, P110.
Tubing size: 1.315"-4 1/2"
End finish: Plain...