These Non-Metallic connectors are molded of Type Nylon 6 Lower Install Costs with Smooth Internal Surfaces for Easier Wire Installation O Ring and Steel Locknut INCLUDED For Indoor and Outdoor Use NO Threading of Conduit Required to Install NO Disassembly Required (Just Push Tubing onto Fitting) Non Metallic Nylon Liquid Tight Electrical Conduit Straight Fittings. These Liquid Tight Electrical Conduit Straight Fittings are constructed of all nylon which resists salt water, weak acids, gasoline, alcohol, oil, and grease. No disassembly is required, instead, the installer simply pushes the conduit or tubing onto ferrule tightening the domed dealing nut. The completed assembly can then be secured in the chassis by the locknut. No threading of the conduit or tubing is required to install, thus eliminating the possibility of cutting the conduit and creating leak paths. The conduit will not wind tight onto the connector during the assembly.