Black Steel Api Line Pipe Coupling

Certified By The American Petroleum Institute

All Of These Black Steel Api Line PipeCouplings Are Manufactured In Accordance With American Petroleum Institute Specifications 5L &Amp; 5B.

All Sizes Are Taper Tapped 3/4 Inch Per Foot On The Diameter. These Couplings Are Phosphated And Each End Has A Short, Unthreaded Space Before The Threads Start. Use With Sch 80 Nipples And Sch 160 Nipples.