Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 546-2277-004 found under by Sierra Nevada Corporation. The National Stock Number assigned to this part is 5826000198472, and the Federal Supply Class is 5826 Radio Navigation Equipment Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 546-2277-004.