Wrench‑Flat Injection Sucker Rod Coupling

Wrench flat injection‑molded sucker rod coupling is integrally molded from high‑performance engineering plastics as one type of Sucker Rod Couplings. Built‑in FS wrench flats on both sides make it fall into Wrench Flat Couplings for convenient tool clamping during field installation and disassembly. It features light weight and zero rust risk, resisting weak acid, alkali and formation brine corrosion, and will not cause metal abrasion damage to tubing inner wall. It is well suited for shallow low‑load oil wells, water injection wells and temporary pumping projects. Different from metallic Alloy Steel Couplings, this plastic coupling does not require surface treatment like Sprayed Metal Couplings, and relies on base plastic material for anti‑corrosion and wear resistance. Both equal‑diameter and reducer types are available in sizes 5/8", 3/4", 7/8", 1". It can work with Slimhole Couplings for slim‑hole applications. Polished Rod Couplings are kept in stock to complete full rod‑strin…