Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-7222-C01 ITEM NO. 8 found under O Ring Set by T And S Brass And Bronze Works Inc. The National Stock Number assigned to this part is 5331015840694, 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 B-7222-C01 ITEM NO. 8.