QQ-I-666D, FEDERAL SPECIFICATION: IRON, MALLEABLE, FERRITIC, FOR CASTINGS (28 JAN 1969) [NO S/S DOCUMENT]

QQ-I-666D, FEDERAL SPECIFICATION: IRON, MALLEABLE, FERRITIC, FOR CASTINGS (28 JAN 1969) [NO S/S DOCUMENT]., This specification covers high grade ferritic malleable iron for general purpose castings.