Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C42123-Z9-C15 found under O Ring by Eads Deutschland Gmbh. The National Stock Number assigned to this part is 5331121444135, 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 C42123-Z9-C15.