Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31556-1 found under Capacitor Fixed Electrolytic by Mid Continent Instrument Co Inc. The National Stock Number assigned to this part is 5910011966153, 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 31556-1.