A listing of bolt torque specifications is available at EngineersHandBook.com. This website contains bolt torque specifications for materials such as steel, aluminum, brass and bronze in both standard and metric measurements.
The EngineersHandbook.com contains information regarding other physics- and engineering-related specifications, such as unit definitions, elemental constants, hydraulic formulas, standard weights and measures and conversion factors. It also presents information on ferrous metals, such as steel and cast iron, and nonferrous metals like titanium in use today. In addition, it contains a listing of various plastics coupled with current uses; for instance, PVC is often used to make pipes, while nylon is commonly used in manufacturing gear wheels.