Orbit SSLN-500 5" Steel Sealing LocknutOrbit SSLN 500 SSLN 500 Product Description Orbit Industries sealing locknuts are used to secure threaded conduits or connectors to electrical junction boxes or enclosures in wet locations. Their gasketed surface provides a water tight seal against the box surface. Orbit Industries sealing locknuts allow standard junction boxes to be used with unthreaded conduit knockout openings in wet locations. Serrated teeth on the locknut bite into the box and