4" Grounding Locknuts - Steel - Grounding Locknuts are Used To Secure and Ground Conduit in an Enclosure.4" Grounding Locknuts - Steel features include: Used with bushings to bond threaded Rigid conduit and IMC to boxes, cabinets, or other enclosures where locknut is exposed Grounding locknuts for securing threaded conduit or connectors with tapered or straight thread, to a knockout or unthreaded slip hole in a Box or Enclosure Grounding Locknut has Integral Ground Screw to Facilitate Grounding to Enclosure Galvanized Steel cULus Listed Order Qty of 1 = 1 Piece Below is more info on our 4" Grounding Locknuts - Steel