Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ESD9655-A-X30SYSTEM found under Recorder Humidity Temperature by Hy Cal Engineering. The National Stock Number assigned to this part is 6685012799975, 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 ESD9655-A-X30SYSTEM.