Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 778-0040-001 found under by Sierra Nevada Corporation. The National Stock Number assigned to this part is 5831001048287, and the Federal Supply Class is 5831 Intercommunication And Public Address Systems Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 778-0040-001.