Threaded Coupling - Three-Piece Iron Trade Size 4 in Overall Length 4 1/2 in Finish Zinc Plated Insulated No Compatible Conduit Type RMC Thread Size 4 in-8 Thread Type NPT Thread Gender Female Elbow Angle Not Applicable Conduit Fitting Type Coupling Standards cUL Listed Federal Specification Number A-A-50553 LEED NEMA FB-1 REACH Compliance RoHS Compliant UL File Number E9391 UL Standard UL-514B For Use With Threaded Rigid Conduit For Conduit Type IMC or Threaded Rigid