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919-TT-C-490E Downloaded from http://www.everyspec.com on 2010-03-16T19:51:06.TT-C-490E July 22, 2002 __SUPERSEDING TT-C-490D March 31, 1993 FEDERAL SPECIFICATION CHEMICAL CONVERSION COATINGS AND PRETREATMENTS FOR FERROUS SURFACES (BASE FOR ORGANIC COATINGS)This specification was approved...