Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HC120120E51E found under Blanket Composite Curing by Heatcon Composite Systems Inc. The National Stock Number assigned to this part is 4920015479639, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HC120120E51E.