Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40-000 found under by Aeronautical Instrument And Radio. The National Stock Number assigned to this part is 5840000050247, and the Federal Supply Class is 5840 Radar Equipment Except Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 40-000.