Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CTD000002 ITEM NO. 7 found under O Ring by Mcc Holdings Inc. The National Stock Number assigned to this part is 5331008080794, 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 CTD000002 ITEM NO. 7.