Which of the following is NOT contained in a plugging kit?

The reasoning behind the correct answer lies in the typical contents of a plugging kit, which is designed specifically for temporary repairs to stop leaks and plugs holes in various materials, particularly in the context of damage control.

A rubber gasket is generally used for sealing purposes, ensuring a tight fit and preventing leakage. In a plugging kit, however, items are usually focused on creating a temporary seal rather than permanently fixing leaks, which makes the gaskets more suitable for other types of maintenance scenarios rather than emergency plug repairs.

On the other hand, hammers, mauls, and even cross-cut saws are tools that are compatible with the needs of a plugging kit. Hammers and mauls are used to drive plugs into place, while a cross-cut saw might be utilized for cutting materials to size or shaping plugs that can be fitted into the leaks.

Understanding the function and typical contents of a plugging kit clarifies why a rubber gasket would not be included, as it does not serve the primary purpose of immediate leak containment or temporary repairs in damage control situations.