Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 37C40A found under Capacitor Fixed Electrolytic by Berkey Technical Div. The National Stock Number assigned to this part is 5910008372579, 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 37C40A.