Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HCS1003-021 found under Capacitor 25000Uf 1 by Heatcon Composite Systems Inc. The National Stock Number assigned to this part is 5910015420280, and the Federal Supply Class is 5910 Capacitors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HCS1003-021.