Product Overview

All coupling threads are manufactured in a cold rolled process. Every coupling is inspected to meet API specification and NineRing internal quality standard to guarantee customer satisfaction.

Standard API Class T, Spray Metal and HS sucker rod coupling, polished rod coupling and combination couplings are available in standard full size and slim-hole sizes. Wrench flat option is also available.

Based on customer requirement, coupling can be pre-installed on sucker rod or packaged separately.

Chemical Composition and Mechanical Properties

NineRing’s API grade coupling are manufactured with AISI 5140 alloy steel. HS grade coupling is manufactured AISI 8630 alloy steel. Spray metal coating material is Ni60 stainless steel.