NSN 5975-01-289-4742

An item of metallic composition with a chamber for sealing compound and two hubs to accommodate electrical conduits of specified sizes. This item is designed with a filler hole and a removable screw plug to enable the pouring of sealing compound into the chamber for the purpose of preventing the passage of explosive gases through a conduit run. The item is primarily designed for use in hazardous locations and may be designed for vertical use, horizontal use, or both. For items which permit the connection or termination of wires, see pothead. See also coupling, electrical conduit.