Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X40-301-528 found under Synchro Control Tra by Bofors A B. The National Stock Number assigned to this part is 5990009174215, and the Federal Supply Class is 5990 Synchros And Resolvers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X40-301-528.