To provide a specification of performance of fuel tanks either manufactured or purchased by a snowmobile manufacturer. This specification includes details of the basic fuel tank without fittings@ cap@ or other attachments@ as well as of completely assembled fuel tanks which include fitting and attachments. Both metallic and nonmetallic fuel tanks are covered. Unless otherwise noted@ requirements apply to both metallic and nonmetallic fuel tanks. Purpose-The purpose of this specification is to provide an accepted standard of quality for snowmobile gas tanks.