Appleton Type EYF are Female/Female. Type EYM are Male/Female both for use with Rigid Steel, Rigid Aluminum and IMC Conduit where Explosionproof, Dust-Ignitionproof class I, II, III are required. These vertical sealing fittings minimize the passage of gases and vapors and prevent the passage of flames from one portion of an electrical system to another through the conduit. Seal conduits in vertical runs. Minimize the passage of gases and vapors from one portion of the electrical system to another through the conduit. Prevent the passage of flames. Malleable iron, zinc electroplated (hot dip or mechanical galvanized optionally available). Aluminum sealing fittings optionally available. Female/female or male/female.Threaded for rigid conduit or IMC. Tapered threads (NPT). EYM style supplied with removable close nipples. Use with Type EYC sealing compound and Type EYF fiber