Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5 28X1 78N830 found under O Ring by Goodyear Dunlop Tires. The National Stock Number assigned to this part is 5331143441848, 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 5 28X1 78N830.