Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BAU050021WA-1-0 found under by Koyo Seiko Co Ltd. The National Stock Number assigned to this part is 2520014323552, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BAU050021WA-1-0.