Parveen Industries Pvt. Ltd. Offers Sucker Rod Coupling and Sub Couplings. The Sucker Rod Coupling and Sub Couplings fall in the category of Sucker Rod Equipment. Parveen Industries Pvt. Ltd. Is an ISO 9001: 2000 certified company. The Sucker Rod Coupling is of `T` and `SM` grades. Both the grades are manufactured with high grade steels [AISI 8630]. The threads of both the grades of coupling are coating for anti-galling properties. Dimension, Tolerance and manufacturing inspection of these couplings conform or exceed the requirement of API-11B latest. The Sub Couplings are used to connect different sizes of Sucker Rod or to connect the Polish Rod to Sucker Rod string. All threads are as per API-11B Polish Rods. These are available in `T` and "SM" grades and with recessed ends and double box.