Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1-70-6422-12-02 ITEM 20 found under O Ring by Barber Industries Ltd. The National Stock Number assigned to this part is 5331219217692, 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 A1-70-6422-12-02 ITEM 20.