Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 121647-1 found under by Bei Sensors And Systems Co Inc. The National Stock Number assigned to this part is 5841001500407, and the Federal Supply Class is 5841 Radar Equipment Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 121647-1.