Form This specification establishes the requirements for a nominal 250 ??cure epoxy preimpregnated carbon fiber plain weave fabric product. The prepreg is a plain weave fabric with 12K tows@ a nominal fiber areal weight of 193 gsm@ and nominal resin content of 42%. Purpose a. The purpose of this specification is to allow procurement of a defined material corresponding to the statistically derived material properties published in CMH-17 Volume II. b. This material is intended for use in laminate applications with a service temperature of ?C65 ??to 180 ?? c. The composite may be used for the manufacture of primary and secondary aircraft structure.