Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NBR70 15.3X2.4ES found under O Ring by Eriks Bv. The National Stock Number assigned to this part is 5331121434260, 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 NBR70 15.3X2.4ES.