Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 289 39BB found under Seal Water by Armatron Intl Inc. The National Stock Number assigned to this part is 5950003997961, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 289 39BB.