This specification covers purchases of aviation turbine fuel under contract and is intended primarily for use by purchasing agencies. This specification does not include all fuels satisfactory for reciprocating aviation turbine engines, but rather, defines the following specific types of aviation fuel for civil use: Jet A; and Jet A-1. The fuels shall be sampled and tested appropriately to examine their conformance to detailed requirements as to composition, volatility, fluidity, combustion, corrosion, thermal stability, contaminants, and additives.