Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10509-4 found under Capacitor Fixed Ceramic Dielectr by The Dewey Electronics Corporation. The National Stock Number assigned to this part is 5910009203478, 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 10509-4.