Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 566D489-1 found under Plug Vent by Bechtel Technical Services Inc. The National Stock Number assigned to this part is 5340014496549, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 566D489-1.