API Spec Polished Rod Joint Assembly

API Alloy Steel Polished Rod Couplings are manufactured strictly according to API Spec 11B 28th Edition. As typical Polished Rod Couplings, they are made of high-strength alloy steel and belong to Alloy Steel Couplings. Designed to connect polished rods, they feature precise threads and excellent anti-galling performance for wellhead working conditions. Customers can choose bare metal finish or upgraded Sprayed Metal Couplings with wear-resistant coating to extend service life. We maintain a complete range of connectors. Besides polished rod couplings, we can supply Sucker Rod Couplings, Slimhole Couplings, Wrench Flat Couplings and more. Standard sizes range from 5/8" to 1-1/8". Bulk orders and customized production are available. Apart from oilfield spare parts, we supply complete HVAC Equipment. Air Diffuser delivers even indoor airflow, Air Curtain blocks convection between cold and hot air, and Smoke Exhaust Fan establishes a dependable fire ventilation system. Air Defense Ven…