LB Type Conduit Body. Features: Tapered Threaded Hubs NPT. To Provide Access to Conductors for Pulling, Slicing and Maintenance, Suitable for use in Concrete, Wet Locations. UL E170258, CSA Certified, UL 514B, Federal Specification A A 50552, NEMA/ANSI FB 1, Military Specification Number W F 406D, W F 406E, W F 408D, W S 610D.