Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SD072032 2.5IN NO. 6 found under O Ring by Eaton Filtration Llc. The National Stock Number assigned to this part is 5331015993187, 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 SD072032 2.5IN NO. 6.