Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9.488X.70-70BU found under O Ring by Apple Rubber Products Inc. The National Stock Number assigned to this part is 5331015712164, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9.488X.70-70BU.