Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P90B1 found under Synchro Differentia by Cardwell Condenser Corp. The National Stock Number assigned to this part is 5990008413396, 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 P90B1.